A population of organisms is said to be in Hardy–Weinberg equilibrium if it is not evolving. In a population that is not evolving, the frequency of alleles, genotypes, and phenotypes remains stable over generations. There are several assumptions that must be true for a population to be in Hardy–Weinberg equilibrium. Select all of the statements that are assumptions of a population in Hardy–Weinberg equilibrium.
a. The population has two alleles of a gene, and one allele is dominant.
b. There is no net mutation of genes.
c. One phenotype has a higher survival rate.
d. Random mating occurs within the population.
e. Migration does not occur to or from the population.
f. The population size is unimportant.