Question

When the environment causes a change in the gene pool by controlling reproductive success according to genotype, it is called ______.

Answer 1

When the environment causes a change in the gene pool by controlling reproductive success according to genotype, it is called natural selection.

Explanation:

Natural selection is the process by which certain alleles increase or decrease in frequency within a population depending on the reproductive success of individuals carrying those alleles. The environment “selects” for genotypes that confer advantages in survival and reproduction, thereby changing the genetic composition of the population over time. Natural selection can be stabilizing, directional, or disruptive depending on how it affects phenotypic variation within the population.