Microevolution: What's An Allele Got to Do With It?: Crash Course Biology #12

Whether we’re talking about tigers, trees, or tarantulas, evolution happens at the level of the population. In this episode of Crash Course Biology, we’ll find out how natural selection, gene flow, genetic drift, and other processes drive changes in populations. We’ll learn about the Hardy-Weinberg equation, how your alleles make you uniquely you, and how some tigers changed their stripes.
Chapters:
When Black Bears Are White 00:00
Genes & Alleles 1:37
Natural Selection 3:33
Genetic Drift 4:26
Gene Flow 8:22
The Hardy-Weinberg Equation 10:02
Review & Credits 11:14
This series was produced in collaboration with HHMI BioInteractive, committed to empowering educators and inspiring students with engaging, accessible, and quality classroom resources. Visit BioInteractive.org/CrashCourse for more information.
Check out our Biology playlist here: • Biology
Watch this series in Spanish on our Crash Course en Español channel here: • Crash Course Biología
Sources: docs.google.com/document/d/1G...
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[@joshuagcwong734]

I love the fact that the indigenous peoples hid the spirit bears from being hunted. It's thanks to them we can see these rare beauties. 😌

[@JurassicLion2049]

As someone who loves white lions Im glad you talked moreso about the lesser known wildlife variants. White Lions are famous but not the only variants and not the only striking one at that. The case of black tigers is really fascinating.

[@yagi6381]

Why is Monokuma in the thumbnail????

[@writerblocks9553]

I was gonna ask the same exact thing!!!

[@kitsunetsuki9453]

We must share a brain 😂

[@inserttexthere1]

Was thinking that too

[@Senbatorii]

I was thinking the same

[@colmryan9289]

I think us Danganronpa fans have one brain cell?

[@Mega_Milk_Mommy]

Monokuma

[@carrotman]

"Oh my God, Karen, you can't just ask black bears why they're white."

[@rhobeans]

Damn it you beat me

[@BuildinWings]

Comment section - You did good on this one. Danganranpa is a way better thing to find than the hacky jokes I feared would be here. Ya did good.

[@inserttexthere1]

Momokuma is that you?

[@CrabSensei]

First! I absolutely love your videos they help me a lot to learn and study. You guys make all my doubts clear and I get to learn even more than my syllabus. 🦋

[@Syco108]

What a fun way to learn

[@njmanga617]

Love this course

[@TheActresss]

i like these vids there genuinely good

[@mohammedhamid2000]

Love❤️❤️
From Bangladesh🇧🇩

[@ThisIsMeAndNotYou]

1 & 9 this is the life

[@yensteel]

This is Joe, an albino brown bear. Every time he is spotted l, he is rescued then woken up in the north pole. Joe: "Fuuuuuu"

[@Omnicloudx13]

All I see is Monokuma.

[@julianshepherd2038]

Cinnamon red?

[@rjvlogs3653]

wait what new crash course

[@nyrdybyrd1702]

Yup, I haven't been watching recently as the fifth episode seemed waaay too cheerful about dead elephants. 😔

[@aspserpent]

Spirit bear

[@glenngriffon8032]

If you're talking evolution on the small scale you should talk about the Bajau and Moken people who have evolved to be better swimmers because of their nomadic fishing lifestyles.

[@williambilyeu9801]

I think several of cats and kittens appeared in this episode.😂😅😊

[@EnderMcCloud]

You never told us to open our eyes, so we still had them closed from the first time. And you never told us to open them the second time, either.

[@thatomofolo452]

👀👀👀

[@imperialthreat]

A ferry full of green peace folks once told me they called these Kermode Bears and that they were their own species not a gene variation but people also said this about Mule Deer and White Tail hybrids. (Shrug)

[@donanilao7724]

Shiny Black Bears be like:

[@awesomehpt8938]

Sure they’re not just polar bears that got lost?

[@yensteel]

Haha, thinking the same. Those poor brown bears get accidentally relocated and have to journey back to the forest.

[@Realisticcat]

First

[@julianshepherd2038]

Sherbet is white.

[@julianshepherd2038]

Are blondes mutants?

[@glenngriffon8032]

Technically everything that isn't the very first original self replicating molecule is a kind of mutant.
So yes, blondes are mutants.