Question

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

Answer 1

Answer:

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

Explanation:

Hope this helps!