How do gene frequencies behave in Hardy-Weinberg equilibrium?

A) Allele frequencies stay the same from generation to generation.
B) Genotype frequencies stay the same from generation to generation.
C) Genotype frequencies depart from expected frequencies.
D) a and b
E) a, b, and c

Hardy-Weinberg Equilibrium

A principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

Allele Frequencies

The relative frequencies of different alleles of a particular gene in a given population.

Genotype Frequencies

The distribution of the different genetic constitutions within a population.