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Frequency of an allele in an isolated population may change due to

1. genetic Drift
2. gene flow
3. mutation
4. natural selection

Correct answer: genetic Drift

Solution

Genetic drift is the random fluctuation of allele frequencies from one generation to the next, especially in isolated or small populations. Because it is driven by chance rather than adaptation, it can change allele frequency even when no other evolutionary force is acting.

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