1-18 population genetics- foundation

1-18 population genetics- foundation - POPULATION GENETICS:...

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POPULATION GENETICS: FOUNDATION LIFE 22.1.4 – 22.1.6; Klug pg. 617 – 624 22.1.4 Evolutionary change can be measured by allele and genotype frequencies -Allele frequencies are usually estimated in locally interbreeding groups, called Mendelian populations , within a geographic population of a species. - frequency of a given allele or genotype is the proportion of the gene pool at that locus . -sum of all allele frequencies at a locus = 1, so measures of allele frequency range from 0 to 1. An allele’s frequency is calculated using the following formula: -if only 2 alleles (i.e. A and a) for a given locus that are found in a diploid population can combine to form 3 different genotypes (AA, Aa, or aa), the population is said to be polymorphic at that locus -If p represents the frequency of A , and q represents the frequency of a , then and -in any population, p + q = 1 22.1.5 The genetic structure of a population does not change over time if certain conditions exist - Hardy–Weinberg equilibrium
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1-18 population genetics- foundation - POPULATION GENETICS:...

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