What factor(s) can decrease genetic diversity within a population? Does it/do they act on both the small and large populations?. Earth & Marine Sciences

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  4. What factor(s) can decrease genetic diversity within a population? Does it/do they act on both the small and large populations?

In a small population, genetic diversity will decrease when alleles are lost due to chance events. This is called genetic drift and is a factor only in small populations. Stabilizing selection can also act to reduce genetic diversity in a population, acting against both extremes in a distribution.

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