An Example Population
Consider a population of ten individuals and a given locus with two possible alleles, A and a. Suppose that the genotypes of the individuals are as follows:
- AA, Aa, AA, aa, Aa, AA, AA, Aa, Aa, and AA
Then the allele frequencies of allele A and allele a are:
so if a locus is chosen at random there is a 70% chance it will be the A allele, and a 30% chance it will be the a allele.
Read more about this topic: Allele Frequency
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—Thomas McGuane (b. 1939)