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Genetic variation is stored in a population's gene poolâthe combined alleles of all of the individuals in a population. allele frequency An allele frequency is a measure of how common a certain allele is in the population.
Your genes have alleles, which are different forms of the same gene. Alleles are like a code for your body that determine hair color and eye color, height, and other genetic features. Genetic variation is the variation in alleles and genes, both within and among populations.Think of a population as a family unit.ene flow is the movement of genetic information between different populations. This method increases genetic variation because introducing new alleles into a population increases the amount of diversity. The more alleles available in a population, the more variation that can occur.