Question

Why don't negative mutations usually increase in frequency in populations?

Answer 1

Within a population, each individual mutation is extremely rare when it first occurs; often there is just one copy of it in the gene pool of an entire species. But huge numbers of mutations may occur every generation in the species as a whole.

Works Cited:

Oct 29, 2007

https://www.scientificamerican.com

Step-by-step explanation:

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