Which of the following is NOT one of the Hardy-Weinberg assumptions?

The Hardy-Weinberg principle is a fundamental concept in population genetics that describes how allele frequencies remain constant in a population under specific conditions. There are five key assumptions of this model: a very large population size (this reduces random genetic drift), random mating (individuals pair by chance, not according to genotype), no selection (where certain alleles are favored or selected for), no migration (no individuals enter or leave the population, preventing gene flow), and no mutations (alterations in the genetic code that could introduce new alleles).

The assumption that is NOT part of the Hardy-Weinberg equilibrium conditions is the presence of genetic mutations. While mutations can occur in real populations, leading to changes in allele frequencies, this phenomenon is not accounted for in the Hardy-Weinberg model, which presumes that allele frequencies remain stable over generations.

By contrast, all the other conditions listed are essential assumptions for a population to maintain genetic equilibrium. Thus, the correct answer highlights the assumption that is outside the Hardy-Weinberg framework.