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An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by an earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called

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Bottle neck effect

Hard-Weinberg equilibrium

Gene migration

Blocked gene flow

answer is B.

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Detailed Solution

Bottle neck effect is a type of genetic drift (change in allelic frequency that occurs by chance). Earthquake is the bottleneck in this case.

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