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After a sudden disaster, some organisms survive and their traits become more common in the population. What can this be related to?

Answer and explanation

Correct answer: Genetic drift, especially a bottleneck effect

A sudden disaster can sharply reduce the size of a population, leaving only a small, possibly random sample of the original individuals. Because the survivors may carry certain alleles by chance, the frequencies of those alleles can change in the remaining population. This random change is genetic drift, and the disaster scenario is specifically called a bottleneck effect. Option A is correct; B, C and D are physiological processes, not population-level changes in allele frequency.

Related tags

Genetic DriftBottleneck EffectPopulation GeneticsHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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