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Protein Synthesis (Updated)
 
08:47
Explore the steps of transcription and translation in protein synthesis! This video explains several reasons why proteins are so important before explaining the roles of mRNA, rRNA, and tRNA in the steps of protein synthesis! Expand details for contents and resources. 👇Video handouts and resources on http://www.amoebasisters.com/handouts. This video replaces our old protein synthesis video: https://youtu.be/h5mJbP23Buo Table of Contents: 0:46 Why are proteins important? 1:48 Introduction to RNA 2:22 Steps of Protein Synthesis 2:43 Transcription 3:54 Translation 6:08 Introduction to mRNA Codon Chart 7:51 Quick Summary Image Vocabulary in this video includes DNA, mRNA, rRNA, and tRNA. This video mentions that proteins can be made of 1 or more polypeptide chains and that proteins typically experience folding and other modifications (to be functional proteins.) Codons and the amino acids they code for is represented by standard charts can be found in the public domain. While the rectangle chart is the common format, there may be other ways to represent the information. P.S. If learning about mutations, check out this cool codon chart that includes mutations(!!) in the public domain: https://commons.wikimedia.org/wiki/File:Notable_mutations.svg Our videos are designed to introduce basic concepts and hopefully to inspire students to stay curious about the content. We simply cannot include all of the exceptions and minute details in a video under 10 minutes, and this is why we so frequently remind people of this in our videos. We want students to go beyond our videos to explore the depth of the material. P.S. On our website, we emphasize that our videos contain science comics- not scientific illustrations. In real life, amoebas don't look like our characters. Our illustrated cell cartoons are definitely not to scale. Nitrogen and carbon don't tap dance. DNA is right-handed (but there are exceptions- worth a google) and doesn't have eyes...a face...or a top hat... Learn more about the purpose of our videos here: http://www.amoebasisters.com/our-videos.html Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages, and we are thankful for those that contribute different languages! YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are not affiliated with any of the translated subtitle credits that YouTube may place below. If you have a concern about community contributed contributions, please contact us.
Views: 1173691 Amoeba Sisters
DNA Replication: The Cell's Extreme Team Sport
 
07:59
Learn the steps of DNA replication, the enzymes involved, and what it means to be a leading or lagging strand! This video has a handout here: http://www.amoebasisters.com/handouts See table of contents by expanding details 👇 Table of Contents: Where and When DNA Replication Occurs 0:37 Why Do You Need to Make More DNA? 1:48 (Some of the) Enzymes Involved in DNA Replication 2:02 DNA Replication Steps 3:22 What does 5' to 3' or 3' to 5' mean? 4:43 Lagging Strand 6:04 Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology P.S. On our website, we emphasize that our videos contain science comics- not scientific illustrations. In real life, amoebas don't look like our characters. Our illustrated cell cartoons are definitely not to scale. Nitrogen and carbon don't tap dance. DNA is right-handed (but there are exceptions- worth a google) and doesn't have eyes...a face...or a top hat... Learn more about the purpose of our videos here: http://www.amoebasisters.com/our-videos.html We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 3130922 Amoeba Sisters
DNA Replication
 
10:10
Paul Andersen explains how DNA replication ensures that each cell formed during the cell cycle has an exact copy of the DNA. He describes the Meselson-Stahl experiment and how it showed that DNA copies itself through a semi-conservative process. He then explains how multiple enzymes, like DNA polymerase, helicase, primase, ligase, and single strand binding proteins copy DNA. He also differentiates between the leading and the lagging strand. He explains how DNA is anti-parallel in nature and how eukaryotic cells have multiple origins of replication. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Views: 932260 Bozeman Science
DNA repair 1 | Biomolecules | MCAT | Khan Academy
 
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Created by Efrat Bruck. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/dna-repair-2?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/differences-in-translation-between-prokaryotes-and-eukaryotes?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 173962 khanacademymedicine
Differences in translation between prokaryotes and eukaryotes | MCAT | Khan Academy
 
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Created by Efrat Bruck. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/dna-repair-1?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/translation-mrna-to-protein?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 192170 khanacademymedicine
DNA Replication Animation - Super EASY
 
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DNA Replication Animation ASSOCIATED VIDEOS & LINKS: -- Mitosis Video: https://goo.gl/uf6hh4 -- Meiosis Video: https://goo.gl/6nZ2Dk -- Transcription & Translation Video: https://goo.gl/KsJSkM -- More information on DNA Replication: https://goo.gl/fhK1eY ✔ Website: http://www.medical-institution.com/ ✔ FREE Medical Videos: http://freemedicalvideos.com/ ✔ Facebook: http://www.facebook.com/Medicalinstitution ✔ Twitter: https://twitter.com/USMLE_HighYield ✔ Google Plus: https://plus.google.com/u/0/+Medicalinstitution ✔ Patron: https://www.patreon.com/medicalinstitution ✔ Pinterest: https://www.pinterest.com/medicalinstitut/ ✔ Instagram: https://goo.gl/vSjlzG This information is intended for educational purposes only, and should not be interpreted as medical advice. Please consult your physician for advice about changes that may affect your health. This Animation explains in detail how the DNA replication takes place. DNA Replication video. DNA Replication animation. DNA Replication tutorial. How does DNA replication work Why is DNA replication important. What is DNA. DNA replication made easy. what is DNA replication. DNA replication made simple. DNA Transcription. DNA Translation. Transcription and Translation.
Views: 3194651 Medical Institution
Prokaryotic vs. Eukaryotic Cells (Updated)
 
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This Amoeba Sisters video starts with providing examples of prokaryotes and eukaryotes before comparing and contrasting prokaryotic cells with eukaryotic cells! Free handout at https://www.amoebasisters.com/handouts. More detail about cell structure and organelles can be found in our cells video: https://youtu.be/8IlzKri08kk Contents: 1:27 Modern Cell Theory 1:37 3 Domains (with examples of Prokaryotes and Eukaryotes) 2:23 Similarities of Prokaryotic Cells and Eukaryotic Cells 3:18 Differences of Prokaryotic Cells and Eukaryotic Cells Support us on Patreon! http://www.patreon.com/amoebasisters More ways to Support Us? http://www.amoebasisters.com/support-us.html Our Resources: Biology Playlist: https://www.youtube.com/playlist?list=PLwL0Myd7Dk1F0iQPGrjehze3eDpco1eVz GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Unlectured Series: https://www.amoebasisters.com/unlectured Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages, and we are thankful for those that contribute different languages! YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are not affiliated with any of the translated subtitle credits that YouTube may place below. If you have a concern about community contributed contributions, please contact us.
Views: 466699 Amoeba Sisters
Equipos de digitacion y transcripcion
 
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Se mencionan los distintos equipos mas usados para la digitacion y transcripcion
Views: 402 Yurleidis Romero
Transcripción del ADN - Educatina
 
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"Transcripción y traducción, ¿son lo mismo? ¡Aprende la diferencia! SUSCRÍBETE ► http://bit.ly/suscribirmeaeducatina Practica con ejercicios, aprende con miles de videos, organiza tu aprendizaje y monitorea tu progreso en Educatina.com ► http://bit.ly/educatinacom La molécula de ADN transporta su información genética a la molécula de ARN, el cual va a salir del núcleo hacia el citoplasma de la célula para transformar esa información en la proteína. La transcripción es el proceso de conversión del ADN en ARN. Que no se debe confundir con el proceso de traducción, que es el que se aplica para la síntesis o generación de proteínas. A la molécula de ARN resultante de este proceso, la llamaremos ARN mensajero (ARNm) para diferenciarlo de otros tipos de ARN, y toma su nombre de su función de transportar información. Para cumplir este proceso se necesita principalmente el ADN, que actúa como molde, indicando que nucleótidos se incorporarán en la molécula de ARNm. El ADN contiene muchísimos genes, uno tras otro a lo largo de toda la alfa hélice, pero la molécula de ARN que se generará transcribirá la información de un solo gen en particular. Síguenos en nuestras Redes Sociales: ~ https://www.facebook.com/educatina/ ~ https://twitter.com/educatina ~ https://www.instagram.com/educatina/ -- Educatina es el canal de educación secundaria N°1 de Latinoamérica con más de 5.000 videos y la mayor variedad de temas: Matemáticas, Física, Ciencias Naturales, Sociales y demás. Con nuestros videos puedes aprender cualquier tema que te interese íntegramente a tu propio ritmo, consultar lo que viste en clase para despejar todas tus dudas o prepararte para un examen."
Views: 1048544 Educatina
Old & Odd: Archaea, Bacteria & Protists - CrashCourse Biology #35
 
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Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most abundant organisms on Earth, and are our oldest, oddest relatives. Crash Course World History is now available on DVD! http://dft.ba/-8bCC Like Crash Course? http://www.facebook.com/YouTubeCrashCourse Follow Crash Course! http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-1EvY Table of Contents 1) Archaea 03:23 a) Methanogens 04:02 b) Extremophiles 04:24 2) Bacteria 05:24:2 3) Gram Positive 06:50 a) Proteobacteria 07:15 b) Cyanobacteria 07:30 c) Spirochetes 07:42 d) Chlamydias 07:52 4) Protists 08:12 a) Protozoa 09:03 b) Algae 09:54 c) Slime Molds 11:13 crash course, biology, archaea, bacteria, protists, unicellular, life, origin, evolution, evolve, eukaryotic, prokaryotic, nucleus, cell membrane, cytoplasm, ribosome, DNA, chromosome, plasmid, extremophile, methanogen, hydrothermal vent, halophile, parasitic, antibiotic, immune system, horizontal gene transfer, diverse, gram staining, gram positive, proteobacteria, cyanobacteria, spirochete, chlamydia, protozoa, algae, dog vomit, slime mold, heterotrophic, flagella, cilia, amoeba, photosynthesis, diatom, sailor's eyeball, bubble algae, seaweed, green, red, brown Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1173463 CrashCourse
Endosymbiotic Theory
 
05:33
Explore the endosymbiotic theory with the Amoeba Sisters! This theory explains the development of the eukaryote cell from prokaryote cell symbiosis. Scientific theories are also briefly defined. Expand details to see table of contents. 👇 This video has a handout here: http://www.amoebasisters.com/handouts.html Table of Contents: What is a Scientific Theory? 0:17 Endosymbiotic Theory Defined 0:45 Prokaryotes vs. Eukaryotes 1:03 Prokaryote Diversity (focusing on select ones in theory) 1:52 Endosymbiotic Theory Shown 2:21 Revealing Organelle Development 3:06 Facts that Support Endosymbiotic Theory 3:46 -Video mentions 4 facts: 3:53, 4:00, 4:07, 4:12 but video mentions this is only a few of many more. Endosymbiosis Example in Termites 4:39 Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology Further Reading: This article is fascinating in that it talks about the relationship such a symbiosis may have with parasitism: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312238/ We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 257773 Amoeba Sisters
(OLD VIDEO) Prokaryotes and Eukaryotes
 
05:53
Video has been redone here: https://youtu.be/Pxujitlv8wc. Music in this video used with permission from Adrian Holovaty (http://www.youtube.com/adrianholovaty). Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language.
Views: 701922 Amoeba Sisters
Cell Transport
 
07:50
Explore the types of passive and active cell transport with the Amoeba Sisters! This video has a handout here: http://www.amoebasisters.com/handouts.html Expand video details for table of contents 👇 Table of Contents: Importance of Cell Membrane for Homeostasis 0:41 Cell Membrane Structure 1:07 Simple Diffusion 1:45 What does it mean to "go with the concentration gradient?" 2:20 Facilitated Diffusion 2:38 Active Transport 4:53 (including endocytosis 5:36 exocytosis 6:36) Transport types covered include simple diffusion, facilitated diffusion, endocytosis, and exocytosis. ATP discussed at 4:35. Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 1619437 Amoeba Sisters
Descargar Biología celular y molecular – Gerald Karp – 5ta Edición PDF
 
00:06
Describe los conceptos fundamentales, como la relación entre la estructura molecular y la función; el carácter dinámico de los organelos celulares; el uso de energía química para las actividades celulares y el aseguramiento de la biosíntesis precisa de macromoléculas; la unidad y diversidad observadas al nivel macromolecular y celular, y los mecanismos que regulan las actividades celulares . Fundamentado en un abordaje experimental. Contenido: 1 – Introducción al estudio de la biología celular y molecular. 2 – Las bases químicas de la vida. 3 – Bioenergética, enzimas y metabolismo. 4 – La estructura y función de la membrana plasmática. 5 – La respiración aeróbica y la mitocondria. 6 – La fotosíntesis y el cloroplasto. 7 – Interacciones entre las células y su ambiente. 8 – Sistemas de membrana citoplásmica: estructura, función y tránsito en la membrana. 9 – El citoesqueleto y la motilidad celular. 10 – Naturaleza del gen y el genoma. 11 – Expresión del material genético: de la transcripción a la traducción. 12 – El núcleo celular y el control de la expresión génica. 13 – Replicación y reparación del DNA. 14 – Reproducción celular. 15 – Señalización celular y transducción de señales: comunicación entre las células. 16 – Cáncer. 17 – La reacción inmunitaria. 18 – Técnicas en biología celular y molecular. En el siguiente enlace pueden descargar este libro en formato Pdf totalmente gratis: https://tinyurl.com/j82dlnv Para descargar más libros gratis de texto universitarios en formato pdf, visita: http://descargalibros-gratis.com
Gene Regulation and the Order of the Operon
 
06:16
Explore gene expression with the Amoeba Sisters, including the fascinating Lac Operon found in bacteria! Learn how genes can be turned "on" and "off" and why this is essential for cellular function. Check out our FREE video handouts on http://www.amoebasisters.com/handouts! Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 685052 Amoeba Sisters
Introduction to Cells: The Grand Cell Tour
 
09:27
Compares and contrasts prokaryote cells and eukaryote cells before exploring organelle structures and functions! Video includes the modern cell theory and plant vs. animal cell comparisons. See table of contents by expanding video details. 👇 Video has a handout: http://www.amoebasisters.com/handouts.html Contents of Major Points in Video: Cell Theory: 1:10 Prokaryotes and Eukaryotes 1:55 Tour Inside Cell Explaining Organelles and Structures 3:11 Plant Cells vs. Animal Cells 7:11 Pathway of Protein Out of Cell 8:15 *As mentioned in video, the structures and organelles mentioned in the video have more functions than able to fit in this short video. We highly encourage you to explore these to discover more! Cell organelles and structures discussed include the cytoplasm, golgi, endoplasmic reticulum, ribosomes, cell membrane, cell wall, vacuoles, mitochondria, and chloroplasts. Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 1283291 Amoeba Sisters
(OLD VIDEO) Viruses
 
07:22
This video has been redone here: https://youtu.be/8FqlTslU22s! Music used with permission from Adrian Holovaty (http://www.youtube.com/c/adrianholovaty). Check out our FREE video handouts on http://www.amoebasisters.com! Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 555921 Amoeba Sisters
Asexual and Sexual Reproduction
 
05:10
Join the Amoeba Sisters as they compare and contrast asexual reproduction with sexual reproduction. This video has a handout here: http://www.amoebasisters.com/handouts.html. See table of contents by expanding details 👇. Table of Contents: Asexual Reproduction 0:59 Sexual Reproduction 2:21 Disadvantages and Advantages of Sexual Reproduction (when compared to asexual reproduction) 3:51 Vocabulary in this video includes DNA, meiosis, chromosomes, binary fission, and budding. Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 479560 Amoeba Sisters
Taxonomy: Life's Filing System - Crash Course Biology #19
 
12:16
Hank tells us the background story and explains the importance of the science of classifying living things, also known as taxonomy. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-2L2C Table of Contents 1) Taxonomy 0:00 2) Phylogenetic Tree 1:24 3) Biolography 2:26 4) Analogous/Homoplasic Traits 3:48 5) Homologous Traits 4:03 6) Taxa & Binomial Nomenclature 4:56 7) Domains 5:48 a) Bateria 6:04 b) Archaea 6:44 c) Eukarya / 4 Kingdoms 6:54 -Plantae 7:56 -Protista 8:23 -Fungi 8:56 -Animalia 9:31 taxonomy, classification, classifying, evolution, filing, science, biology, life, organism, relationship, ancestor, ancestry, evolutionary tree, phylogenetic tree, tree of life, biolography, carl von linnaeus, linnaeus, botanist, botanical name, morphology, homologous traits, systema naturae, taxa, groups, kingdom, phylum, class, order, family, genus, species, binomial nomenclature, latin, domain, archaea, eukarya, division, autotrophs, heterotrophs, protist, fungi, animalia, animal, cat, kitty Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1783284 CrashCourse
Animal cell funtions
 
01:01
this video describes important functions in cell knowledge based video please like share and subscribe 7th grade animal cell project, a animal cell drawing, animal cell, animal cell and plant cell, animal cell and plant cell diagram, animal cell and plant cell difference, animal cell and plant cell in hindi, animal cell and plant cell parts and functions, animal cell basic biology, animal cell basic parts, animal cell bbc, animal cell biology textbook, animal cell board game, animal cell by smart learning for all, animal cell cartoon, animal cell culture, animal cell culture introduction, animal cell culture media, animal cell diagram, animal cell diagram for class 6, animal cell diagram for class 9, animal cell diagram step by step, animal cell diy, animal cell for class 8, animal cell for kids, animal cell functions for kids, animal cell gcse, animal cell grade 8, animal cell house analogy, animal cell how to draw, animal cell in urdu, animal cell junctions, animal cell model, animal cell model 3d project, animal cell model diy, animal cell model for kids, animal cell model jello, animal cell model project, animal cell model with clay, animal cell project, animal cell structure, celula animal e vegetal, celulas eucariontes animal e vegetal, citologia celula animal e vegetal, how an animal cell works a biology degree, a biology degree is worthless, a biology experiment requires the preparation, a biology joke, a biology major, a biology question, a biology students performed an experiment, a biology word that starts with y, a biology-related discovery, b biology word whizzle, biology, biology a course for o level, biology a human body system in a nutshell, biology a level, biology a level book, biology a level past papers, biology a level syllabus, biology, biology and its branches, biology animations, biology app, biology as level notes, biology b exam review, biology b final exam, biology b final exam answers, biology b final exam review answers, biology b quizlet, biology book, biology branches, biology c value, biology, biology d g mackean, biology d.n.a, biology decoded, biology definition, biology definition in english, biology definition in urdu, biology diagrams, biology diagrams, biology dictionary, biology dictionary download, biology dictionary english to urdu, biology dictionary pdf, biology easy notes, biology encyclopedia, biology engineering and medicine, biology english to urdu dictionary, biology answers, biology experiments, biology , biology mcqs, biology meaning in urdu, biology videos c in biology medical school, coach c biology, d in biology pre biology, function of cell, function of cell body, function of cell capsule, function of cell for kids, function of cell in hindi, function of cell in human body, function of cell membrane, function of cell membrane proteins, function of cell modification, function of cell organelles, function of cell organelles in hindi, function of cell organelles ppt, function of cell parts, function of cell phone, function of cell structure, function of cell surface receptor, function of cell u loss, function of cell video, function of cell wall, function of cell wall class 9, function of cell wall in hindi, function of cell wall in onion cell, function of cell wall in plant cell, structure and function of cell membrane, structure and function of cell organelles, structure and function of cell wall 2 min informative speech, 3 minute informative speech, 5 informative advertisements, 5 minute informative speech, 6 min informative speech, 6 minute informative speech, a good informative speech, a informative speech, a very informative exchange, com 100 informative speech, com 181 informative speech, comm 104 informative speech, comm 110 informative speech, comm 3356 informative, coms 101 informative speech, elc590 informative speech, gosu informative, how to informative speech, human trafficking informative speech, ihsa informative speaking 2016, information brief, information ratio, information regarding, information reports, information retrieval, information retrieval course, information retrieval lectures, information retrieval mit, information retrieval stanford, information retrieval stanford video lectures, informative,
Views: 483 ChanGe
The Reproductive System: How Gonads Go - CrashCourse Biology #34
 
12:02
Hank lets us in on the meaning of life, at least from a biological perspective - it's reproduction, which answers the essential question of all organisms: how do I make more of myself? So, sex, how does it work? Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse: http://www.twitter.com/TheCrashCourse Table of Contents 1) Gametes: Ova and Sperm 2:27 2) Sex Determination 4:59 3) Secondary Sexual Characteristics 6:48 4) Female Reproductive Structures 7:25 a) Uterus & Oviducts 7:40 b) Endometrium (Menstruation) 7:57 c) Cervix & Vagina 8:32 5) Male Reproductive Structures 8:45 a) Scrotum, Sminferous Tubules & Epididymas 8:59 b) Penis 9:37 c) Vas Deferens to Eurethra (Emission) 10:13 References http://www.sciencemag.org/content/281/5385/1979 http://www.medicinenet.com/miscarriage/article.htm http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559814/) Campbell Biology, 9th ed. crash course, crashcourse, biology, science, reproductive system, reproduction, asexual, sexual, eukaryote, genome, offspring, sex cell, sex, animal, gamete, ovum, egg, ovule, sperm, hermaphrodite, genitals, male, female, behavior, production, storage, delivery, courtship, fertilize, gonads, organ, sex determining chromosome, nipple, estrogen, testosterone, puberty, secondary sex characteristics, breasts, human, ovary, fallopian tube, menstrual cycle, ovulation, uterus, cervix, vagina, testes, penis, erection, coitus, semen, emission, ejaculation, vas deferens, prostate gland Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 823589 CrashCourse
Cellular Respiration and the Mighty Mitochondria
 
07:49
Explore how ATP is made in 3 steps of aerobic cellular respiration with the Amoeba Sisters! This also compares this process to photosynthesis and introduces ATP structure. This video has a handout here: http://www.amoebasisters.com/handouts.html We appreciate feedback on our videos and pin clarifications on our videos if needed. We do wish we had been more clear stating that the Krebs cycle "'indirectly" requires oxygen" instead of just stating it "requires oxygen" ---as we do not want to imply that oxygen is a reactant in the Krebs cycle (Citric Acid Cycle). While oxygen is not a reactant for the Krebs Cycle, the oxidation steps of the Krebs Cycle cannot occur without the presence of oxygen. (Thus, the Krebs Cycle is considered an aerobic process) Reference Source: OpenStax https://cnx.org/contents/[email protected]:[email protected]/Oxidation-of-Pyruvate-and-the- 36 ATP? 38 ATP? The big thing we want to emphasize, as we do in the video, is this number is an estimate. It's likely not even as high as those numbers everytime. And regarding the video note about how ATP may need to be used to shuttle in NADH from glycolysis---here's a question answered by Miller and Levine that you may find helpful: http://www.millerandlevine.com/ques/atp.html Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 1647608 Amoeba Sisters
Ejercicio: Transcripción de una cadena de ADN a ARNm
 
04:59
Instagram: https://www.instagram.com/rbnterrassa/ Twitter: https://twitter.com/Ruben_Cingle Explicaremos como transcribir una cadena de ADN para obtener la secuencia del ARNm que genera. Hay que recordar que en el ARN los pares de bases son adenina=uracilo y citosina=guanina (NO HAY TIMINA EN LAS CADENAS DE ARN).
Views: 51833 Ruben Sebastian
¿Qué es la Mitosis? - Biología - Educatina
 
09:54
"La mitosis es la última parte del ciclo celular y consiste de cuatro faces. ¡Vamos a aprenderlas!. SUSCRÍBETE ► http://bit.ly/suscribirmeaeducatina Practica con ejercicios, aprende con miles de videos, organiza tu aprendizaje y monitorea tu progreso en Educatina.com ► http://bit.ly/educatinacom La mitosis es la última parte del ciclo celular, en la cual van a separarse el material genético duplicado y se generarán dos núcleos, necesarios para terminar el ciclo de reproducción y dar origen a dos células hijas. La mitosis a su vez se separa en cuatro fases: la profase, metafase, telofase y anafase. Mientras descubrimos esta fascinante forma de reproducción celular asexual, analizaremos cada una así como términos y conceptos como los cromosomas, las cromátides, los centrómeros, el huso mitótico y los microtúbulos. Síguenos en nuestras Redes Sociales: ~ https://www.facebook.com/educatina/ ~ https://twitter.com/educatina ~ https://www.instagram.com/educatina/ -- Educatina es el canal de educación secundaria N°1 de Latinoamérica con más de 5.000 videos y la mayor variedad de temas: Matemáticas, Física, Ciencias Naturales, Sociales y demás. Con nuestros videos puedes aprender cualquier tema que te interese íntegramente a tu propio ritmo, consultar lo que viste en clase para despejar todas tus dudas o prepararte para un examen."
Views: 1411971 Educatina
Leyes de Mendel - Educatina
 
11:29
Mendel supo explicar la herencia de caracteres sin saber de ADN o genética. ¡Aprende cómo! SUSCRÍBETE ► http://bit.ly/suscribirmeaeducatina Practica con ejercicios, aprende con miles de videos, organiza tu aprendizaje y monitorea tu progreso en Educatina.com ► http://bit.ly/educatinacom Analizaremos en detalle cómo se realizaron los experimentos del Dr. Gregor Mendel en plantas para explicar la herencia genética. Si bien en la época de Mendel no se conocía el ADN ni los cromosomas, sus leyes nos sirven en la actualidad para comprender como se heredan los genes de nuestros ancestros. La primera ley de Mendel es llamada Ley de la uniformidad y dicta que al cruzar dos variedades de una especie de raza pura, cada uno de los híbridos de la primera generación tendrá caracteres determinados similares en su fenotipo. Esto se debe a que las razas puras tienen un gen dominante o un gen recesivo, y en su herencia se expresa el dominante. La segunda ley de Mendel (1822 –1884) o del principio de segregación, se basa en la autofecundación de la primera generación de semillas (F1), para generar una segunda descendencia (F2). De esta manera, cuando las células de F1 entren en meiosis y generen sus gametos, obtendremos gametos verdes dominantes (A) y gametos amarillos recesivos (a), lo que dará como resultado, al fecundarse dichos gametos, las células con las diferentes combinaciones: AA, Aa, aA y aa. Es así, que las primeras 3 combinaciones serán verdes, al ser dominante el verde sobre el amarillo, y la última será amarilla, sin margen de error. A partir de este último ejemplo, la segunda ley establece que para genes recesivos, su característica fenotípica aparecerá en la segunda generación (F2), con una probabilidad de 1/4. La tercera ley de Mendel o de de segregación independiente, surge a partir de los experimentos hechos por el naturalista, donde cruzó plantas que diferían tanto en color como en textura, como el caso de plantas amarillas y lisas, con otras verdes y rugosas. Así como en la primera ley, podemos ver que si generamos los gametos y los fecundamos entre sí, todas las plantas de la primera generación (F1), tendrán las características dominantes, es decir, serán verdes y rugosas. Por otra parte, si ahora tomamos F1 y repetimos los pasos anteriores, obtendremos 16 células diferentes, donde solo 9 serán verdes y rugosas, 3 amarillas y rugosas, 3 verdes y lisas y solo 1 amarilla y lisa como su ancestro inicial P. De esta manera, si estudiáramos cada característica por separado, como puede ser el color verde, notaríamos que seguiríamos manteniendo la misma probabilidad de 1/4, correspondiente a la segunda ley. Esto nos da la pauta de que cada característica se transmite de manera independiente. Síguenos en nuestras Redes Sociales: ~ https://www.facebook.com/educatina/ ~ https://twitter.com/educatina ~ https://www.instagram.com/educatina/ -- Educatina es el canal de educación secundaria N°1 de Latinoamérica con más de 5.000 videos y la mayor variedad de temas: Matemáticas, Física, Ciencias Naturales, Sociales y demás. Con nuestros videos puedes aprender cualquier tema que te interese íntegramente a tu propio ritmo, consultar lo que viste en clase para despejar todas tus dudas o prepararte para un examen.
Views: 904780 Educatina