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 HardyWeinberg 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 HardyWeinberg 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 https://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: https://docs.google.com/document/d/1G...

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