An isolated population with equal number of blue-eyed and brown-eyed individuals was decimated by earthquake. Only a few brown eyed individuals survived to form next generation. The change in gene pool is :

Hardy-Weinberg equilibrium

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Blocked gene flow

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Founder effect

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Bottleneck effect

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Solution

The correct option is D Bottleneck effect
Bottleneck effect is an evolutionary event in which a very large percentage of a population or species is killed or otherwise prevented from reproducing.
Population bottlenecks increase genetic drift. They also increase inbreeding due to the reduced pool of possible mates.
In the given case, blue-eyed population has been wiped out while the surviving brown-eyed individuals form the next generation.
So, the correct answer is 'Bottleneck effect'

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