The genes F and G act in accordance with the Dobzhansky-Muller model leading to sterility in hybrids between two species of monkeyflowers.Any combination of the F2 and the G1 alleles causes hybrids to be sterile.Based on the Dobzhansky-Muller model, which genotype should have high fitness?
A) F1F1; G1G1
B) F1F2; G1G2
C) F2F0; G1G2
D) F1F2; G0G1
E) F1F2; G1G1

Question

Quizplus · Accepted Answer

According to the Dobzhansky-Muller model, incompatible alleles between two species can lead to reduced fitness in hybrids, including sterility. Since any combination of F2 and G1 alleles in hybrids causes sterility, the F1F1; G1G1 genotype would have high fitness because it would not carry any incompatible alleles.

The Genes F and G Act in Accordance with the Dobzhansky-Muller