Genetic drift operates only in

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(B) $Genetic$ $drift$ is a random change in allele frequencies within a population from one generation to the next. It occurs due to chance events,whi

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Smaller populations

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(B) $Genetic$ $drift$ is a random change in allele frequencies within a population from one generation to the next. It occurs due to chance events,which have a significantly greater impact on smaller populations compared to larger ones. In small populations,random fluctuations can lead to the loss or fixation of alleles,whereas in large populations,these effects are buffered by the large number of individuals.

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