How does natural selection break h-w assumptions?

Answer 1

One big Hardy-Weinberg assumption is that there is no mutation taking place in the population of interest. Mutation and selection lead to evolution, which the Hardy-Weinberg assumption also does not allow in a population. So, if there is the variation brought about by mutation then there is a chance of natural selection happening and this violates Hardy-Weinberg assumptions.

Answer 2

Natural selection can break Hardy-Weinberg assumptions by changing allele frequencies in a population over time. If certain alleles provide a reproductive advantage, they will increase in frequency, leading to deviation from the assumptions of random mating, no natural selection, large population size, no mutation, and no gene flow. This can result in evolution occurring within a population.