Genotype frequency

In population genetics, the genotype frequency is the frequency or proportion (i.e. 0 < f < 1) of genotypes in a population.

It may be denoted thus:

$$f(\mathbf{AA})$$

Compare allele frequency.

The Hardy-Weinberg law predicts genotype frequencies from allele frequencies under certain conditions, in which case:


 * $$f(\mathbf{AA}) = p^2$$
 * $$f(\mathbf{Aa}) = 2pq$$
 * $$f(\mathbf{aa}) = q^2$$

Genotype frequencies may be represented by a De Finetti diagram.

Frequenza del genotipo Genotípus-gyakoriság 基因型频率