Which condition is NOT one of the Hardy-Weinberg principles for a non-evolving population?

The condition that is NOT one of the Hardy-Weinberg principles for a non-evolving population is the presence of mutations. The Hardy-Weinberg equilibrium relies on a set of ideal conditions that must be met for a population to maintain genetic stability over generations. These conditions include a large population size, which helps to minimize genetic drift; random mating to ensure that all individuals have an equal chance of contributing to the gene pool; and no migrations, which prevents the introduction or removal of alleles from the population.

The presence of mutations introduces new genetic variations into a population, which can disrupt the equilibrium by altering allele frequencies. Thus, mutations are actually a source of evolutionary change rather than a condition conducive to a non-evolving population. Therefore, recognizing that mutations are not compatible with the principles of Hardy-Weinberg helps to clarify the nature of genetic stability in a population.