Which assumption must be correct for a population to be in hardy-weinberg equilibrium for a specific gene?

If a population is in Hardy-Weinberg equilibrium the allele frequencies for a specific gene remain constant. In order for this to be true, the law makes several assumptions:

1. No mechanisms of evolution occur

No mutations: the alleles remain unchanged No migration: no alleles leave or arrive to the population from the outside No natural selection: all genotypes have the same chance of survival.

2. The population is very large, almost infinite number of individuals.

3. The individuals mate randomly.

No genetic drift can affect allele frequencies for the gene.

Explanation:

Any condition that changes allele frequencies in the population represents a violation of the Hardy-Weinberg principle and means that the population will not be in Hardy-Weinberg equilibrium.