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If only a few deer survive after a flood and form a new population, why may the gene frequency of that population change?

Answer and explanation

Correct answer: Because the survivors may not represent the original population accurately

A flood can kill individuals randomly, so the few deer that survive may carry some alleles in proportions different from those in the original herd. When these survivors reproduce, their accidental genetic sample becomes the starting point of the new population. This bottleneck effect is a form of genetic drift, making option A correct. The flood does not make every gene useful, deer do possess genes, and reproduction need not stop.

Related tags

Bottleneck-EffectGenetic-DriftGene-FrequencyPopulationHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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