Allele frequency refers to the fraction of individuals with a particular version of a given gene. What effect does natural selec
tion have on the allele frequency of a population? A. It causes the allele frequency to resemble that of a small number of individuals that became separated from the rest of the population. B. It increases the frequency of alleles that improve a species' survival in a particular environment. C. It causes random changes and the allele frequency of certain traits may increase or decrease. D. It greatly reduces the total population, which increases the effects of genetic drift on allele frequency.
B. It increases the frequency of alleles that improve a species' survival in a particular environment.
Explanation:
Natural selection encourages the survival and reproduction of individuals who are especially well-adapted to their environment. This means that natural selection causes increases in the frequency of alleles that improve the species' survival in a particular environment. (got it right on study island)
