Sources of genetic variation | Inheritance and variation | High school biology | Khan Academy

Keep going! Check out the next lesson and practice what you’re learning:
www.khanacademy.org/science/h...
In sexual reproduction, chromosomes can sometimes swap sections during the process of meiosis (cell division), thereby creating new genetic combinations and thus more genetic variation. Although DNA replication is tightly regulated and remarkably accurate, errors do occur and result in mutations, which are also a source of genetic variation. Environmental factors can also cause mutations in genes, and viable mutations are inherited.
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: www.khanacademy.org/donate
Volunteer here: www.khanacademy.org/contribute
Credits:
Meiosis diagram modified from "MajorEventsInMeiosis" by the National Institutes of Health [Public domain]:
commons.wikimedia.org/wiki/Fi...

[@emmanuelbinen6554]

I really like your courses, just your voice makes things easier and clearer

[@gregorewart5946]

Thank you for the explanatio. Really. Helping a guy out here

[@divaaporwal3789]

Love ur videos….thx for uploading…hats off to ur efforts!!!❤

[@nobita_lyrical_shorts]

Amazing

[@tohirarifin7497]

Very nice

[@waxtarkabulshada1]

I like your videos

[@kaifkhan7161]

Nice

[@preethamyadav8907]

Can u pls make a video about heart murmurs.

[@YlverMoreno]

Thanks 👍 you. I always like learn with you 😁

[@kurd7585]

thanx that was rely help full
sorry but I noted that in 5:50 you have color blind or you just mistake it

[@Residual-Image]

So peopleanity needs at least 70 trillion population before we can see if people repeat. There could be a completely independent genetic replica of "Jim down the street" by sheer (lack of) odds.

[@abdulwasay9231]

Do u mean humanity?

[@mtfgemni2118]

Hello here when it is 300 view see u in 10 million view

[@abdulwasay9231]

1 year later it’s at 27k

[@abdulwasay9231]

At this rate it will take another 370 years and I don’t think u will be alive by then

[@Hassanawan699]

Not fine