Population_Genet18023 - 1 Population Genetics Population...

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1 Population Genetics Population: group of interbreeding organisms similar in appearance and generally inhabiting the same geographic area. Gene pool: the sum total of all alleles distributed among the individuals of a population at a given point in time. Genotypic frequencies: the frequency of heterozygous and homozygous individuals in a population. For example, the frequency of heterozygotes in a population is determined by dividing the number of heterozygotes present, by the number of total individuals in the population. Allelic frequency: the allelic frequency is the sum total of each allele in a population divided by the total number of alleles in that population. For example, if a population is composed of AA, Aa, and aa individuals, the frequency of A is equal to A divided by the total number of all A’s and a’s. The sum of these alleles is equal to 1. Hardy-Weinberg equation represents genotypic frequencies: p 2 + 2pq + q 2 = 1, where p 2 = frequency of homozygous dominants (AA); 2pq = heterozygotes (Aa); q
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