The population of beavers is randomly mating. for many versions by g-49% aa is phenotypic if 10 years ago. The proportion of the population that has the g-Ki are phenotypic Aa%
The beaver population has many versions by random mating genotype aa with 49% if the over 10 years. The proportion of the population with genotype Aa a few%.
The population of animals have mating together randomly for many generations by genotype AA have 49% if over time 10 years the proportion of the population. Genotype Aa is a few percent.