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genetic drift in biology 1 sentence short definition, 2 short examples of it, and one short sentence using it
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Definition: Genetic drift is the random change in allele frequencies in a population over time due to chance events, especially important in small populations.
Example 1: After a storm wipes out most of a deer population, the surviving individuals' alleles dominate future generations (bottleneck effect).
Example 2: A few insects colonize a new island and the island population's gene pool reflects only the founders' alleles (founder effect).
One-sentence use: Genetic drift can rapidly alter genetic diversity in small, isolated populations.
Example 1: After a storm wipes out most of a deer population, the surviving individuals' alleles dominate future generations (bottleneck effect).
Example 2: A few insects colonize a new island and the island population's gene pool reflects only the founders' alleles (founder effect).
One-sentence use: Genetic drift can rapidly alter genetic diversity in small, isolated populations.
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