In population genetics, the Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or rule, holds that in the absence of additional evolutionary forces, allele and genotype frequencies from generation to generation, a population would remain stable.
The Hardy Weinberg equation is written as: 2pq + p2 + q2 = 1
The Hardy-Weinberg model states that if five conditions are met, a population will remain in genetic equilibrium.
Those conditions are:
There must be no mutation, no gene flow, a huge population size, random mating, and no natural selection for the Hardy-Weinberg equilibrium to persist.
Deviations from any of the Hardy-Weinberg equilibrium's five fundamental underlying requirements can cause it to collapse.
No new alleles or genes are duplicated or deleted as a result of mutation.
Random mating: Without regard for particular genotypes, organisms mate with one another at random.
No people or their gametes (such as windborne pollen) enter or leave the population because there is no gene flow.
Very vast population: There should be an infinitely large population.
Absence of natural selection Equal fitness is conferred by all alleles (make organisms equally likely to survive and reproduce).