Editing Allele frequency (section)

====Example====
Consider a locus that carries two alleles, '''A''' and '''B'''. In a diploid population there are three possible genotypes, two [[homozygous]] genotypes ('''AA''' and '''BB'''), and one [[heterozygous]] genotype ('''AB'''). If we sample 10 individuals from the population, and we observe the genotype frequencies
# freq ('''AA''') = 6
# freq ('''AB''') = 3
# freq ('''BB''') = 1
then there are <math> 6\times2 + 3 = 15 </math> observed copies of the '''A''' allele and <math> 1\times2 + 3 = 5 </math> of the '''B''' allele, out of 20 total chromosome copies. The frequency ''p'' of the '''A''' allele is ''p'' = 15/20 = 0.75, and the frequency ''q'' of the '''B''' allele is ''q'' = 5/20 = 0.25.