Genetic drift operates only in

Larger populations

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Mendelian populations

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Island populations

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Smaller populations

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Solution

The correct option is D Smaller populations
The random changes in gene frequencies in a population occurring by chance alone rather than by natural selection are called genetic drift or Sewall Wrigth effect. The effects of genetic drift are most marked in very small isolated population, although it occurs in all populations.
So, the correct answer is 'Smaller populations'.

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Similar questions

Assertion:Genetic drift is the change in allele frequencies of a population

Reason: Genetic drift always takes place in the large populations.

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