At an underdominant locus,how will allele frequencies change through time?
A)The homozygote with the greatest fitness advantage will have its allele fixed.
B)A balanced polymorphism of both alleles will be maintained at a stable equilibrium.
C)The homozygote with the lowest fitness advantage will have its allele lost.
D)One or the other allele will be lost depending on their initial frequencies.
E)Both alleles will be lost.

Question

Quizplus · Accepted Answer

At an underdominant locus, both alleles have equal fitness and are maintained in balance. However, any perturbation (such as genetic drift or mutation) can lead to the loss of one or the other allele, depending on their initial frequencies. This eventually results in the fixation of one allele, which may or may not have a fitness advantage over the other. Therefore, the allele frequencies at an underdominant locus are not stable and can fluctuate over time.

At an Underdominant Locus,how Will Allele Frequencies Change Through Time