**Allele frequency**is a measure of the relative

**frequency**of an

**allele**on a genetic locus in a population. Usually it is expressed as a proportion or a percentage. In population genetics,

**allele frequencies**show the genetic diversity of a species population or equivalently the richness of its gene pool.

Keeping this in view, what is the frequency of a genotype?

**Genotype frequency**in a population is the number of individuals with a given

**genotype**divided by the total number of individuals in the population. In population genetics, the

**genotype frequency**is the

**frequency**or proportion (i.e., 0 < f < 1) of

**genotypes**in a population.

How is allele frequency calculated?

In the equation, p

^{2}represents the**frequency**of the homozygous genotype AA, q^{2}represents the**frequency**of the homozygous genotype aa, and 2pq represents the**frequency**of the heterozygous genotype Aa. In addition, the sum of the**allele frequencies**for all the**alleles**at the locus must be 1, so p + q = 1.What is the frequency of the dominant allele?

The frequency of the recessive allele. Answer: Since we believe that the homozygous recessive for this gene (q

^{2}) represents 4% (i.e. =**0.04**), the square root (q) is 0.2 (20%). The frequency of the dominant allele. Answer: Since q = 0.2, and p + q = 1, then**p = 0.8**(80%).