Question

what is the Hardy-Weinberg equilibrium?

Answer 1

http://en.wikipedia.org/wiki/Hardy%E2%80%93Weinberg_principle

Answer 2

it is an equation that allows the prediction if evolution is taking place.

Answer 3

A fundamental principle in population genetics stating that the genotype frequencies and gene frequencies of a large, randomly mating population remain constant provided immigration, mutation, and selection do not take place.