3.5 - Genetic Drift

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Last updated 12:57 AM on 8/3/26
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5 Terms

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What is genetic drift?

Random changes in allele frequencies due to chance.

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Which populations are most affected by genetic drift?

Small populations.

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What is the founder effect?

When a small group starts a new population with only part of the original gene pool.

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What is the bottleneck effect?

A sudden reduction in population size causing loss of genetic variation.

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: How does genetic drift differ from natural selection?

Drift is random; natural selection is driven by fitness differences.