When only a few individuals survive unfavorable times,thereby losing a majority of genotypes in the next generation,it is referred to as

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When a species is subjected to near extinction,it is as if most of the population has stayed behind and only a few survivors have passed through the neck of a bottle.This so-called bottleneck effect prevents the majority of genotypes from participating in the production of the next generation.

When Only a Few Individuals Survive Unfavorable Times,thereby Losing a Majority