When is genetic drift operative?

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(A) Genetic drift refers to the change in allele frequencies in a population due to chance events. It is most significant in small,isolated population

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Small isolated population

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(A) Genetic drift refers to the change in allele frequencies in a population due to chance events. It is most significant in small,isolated populations where random fluctuations can lead to the loss or fixation of alleles. In large populations,these random changes are buffered by the large number of individuals,making the effect of genetic drift negligible. Therefore,genetic drift is highly operative in small isolated populations.

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