Consider a locus with two alleles, A and a. Under which of the following scenarios will the frequency of the A allele increase?
A)The fitness of AA and Aa individuals are higher than the fitness of aa individuals.
B) The fitness of heterozygotes is higher than the fitness of either homozygote.
C) The fitness of heterozygotes is lower than the fitness of either homozygote.
D) The fitness of aa individuals is higher than the fitness of Aa and A A individuals.

Question

Quizplus · Accepted Answer

In scenario A, individuals with the A allele have a higher fitness, meaning they are more likely to survive and reproduce. As a result, the frequency of the A allele will increase in the population over time. In scenarios B and C, heterozygotes either have higher or lower fitness than both homozygotes, which can lead to different outcomes depending on the specific conditions. In scenario D, the aa individuals have higher fitness, which means they are more likely to survive and reproduce. This would lead to a decrease in the frequency of the A allele in the population over time.

Consider a Locus with Two Alleles, a and A