Allele frequency is the proportion of all copies of a gene belonging to specific gene variant.

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"Allele frequency is the proportion of all copies of a gene that is made up of a particular gene variant (allele). In other words, it is the number of copies of a particular allele divided by the number of copies of all alleles at the genetic place (locus) in a population. It can be expressed for example as a percentage. In population genetics, allele frequencies are used to depict the amount of genetic diversity at the individual, population, and species level."

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Source(s):
http://en.wikipedia.org/wiki/Allele_frequency


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