Frequency-Dependent Selection, as Seen in the Case of the Scale-Eating

Multiple Choice

Frequency-dependent selection, as seen in the case of the scale-eating fish in Lake Tanganyika, tends to

A) eliminate rare alleles and favor whichever allele is initially most frequent.
B) maintain two phenotypes in a dynamic equilibrium in a population.
C) produce random changes in allele frequencies.
D) stimulate new mutations.