Khan Academy's video: Sexual reproduction and genetic variation Middle school biology Khan Academy

Keep learning! View more lessons or practice this subject at https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:inheritance-and-variation/x0c5bb03129646fd6:reproduction-and-genetic-variation/v/sexual-reproduction-and-genetic-variation In sexually reproducing organisms, each parent contributes half of the genes acquired (at random) by the offspring. Individuals have two of each chromosome and hence two alleles of each gene, one acquired from each parent. These versions may be identical or may differ from each other. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate Volunteer here: https://www.khanacademy.org/contribute Credits: "Jackson siblings 1977" by CBS Television [Public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Jackson_siblings_1977.jpg "The Pham Family 1960" by Mr. Pham, licensed under a Creative Commons Attribution License (CC BY-SA 4.0): https://commons.wikimedia.org/wiki/File:Pham_Family_1960.jpg https://creativecommons.org/licenses/by-sa/4.0/deed.en "Gunhild Karlsson family c 1931" by Unknown photographer for family files, acquired by FamSAC [Public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Gunhild_Karlsson_family_c_1931.jpg "Karyotype" by National Human Genome Research Institute [Public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Karyotype.png "Sperm-egg" by Unknown author [Public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Sperm-egg.jpg Chromosome diagram created with Biorender.com: https://biorender.com/