Which of the following genotypic fitness values would result in the most rapid fixation of the beneficial allele, A?
A) AA: 1.0, Aa: 1.0, aa: 0.8
B) AA: 1.0, Aa: 0.9, aa: 0.8
C) AA: 1.0, Aa: 0.8, aa: 0.8
D) AA: 1.0, Aa: 1.0, aa: 1.0

Question

Quizplus · Accepted Answer

In order for a beneficial allele to fix rapidly (i.e. reach a frequency of 1 in the population), it needs to provide a significant fitness advantage over the alternative allele. In this case, option B has the largest fitness difference between the homozygous dominant and heterozygous genotypes (0.1 difference), while still maintaining a solid fitness advantage for the beneficial allele over the recessive allele (0.2 difference). This larger fitness difference will result in faster selection for the beneficial allele and faster fixation in the population.

Which of the Following Genotypic Fitness Values Would Result in the Most