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. Allele frequency is defined as follows: Given the following:a particular
chromosome locus and the
gene occupying that locusa population of individuals carrying n loci in each of their
somatic cells (e.g. two loci in the cells of
diploid species, which contain two sets of chromosomes)a variant or
allele of the gene, then the allele frequency is the fraction or percentage of loci that the allele occupies within the population.
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