The hardy–weinberg equilibrium model states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. because one or more of the influences listed above are typically present in real populations, the hardy–weinberg model describes an ideal condition against which the effects of these influences can be analyzed. of the influences listed, which would not cause a change in allelic frequencies or genotype? a) mutation b) genetic drift c) mitotic divison d) sexual selection