Biology 1001A Lecture Notes - Lecture 13: Snow Goose, Genetic Drift, Assortative Mating
7 Mar 2016
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Clicker q: how will allele frequencies change its wrr = wss > wrs, whichever allele has a higher staring frequency will continue to increase in frequency; the other allele will decrease until it disappears from the pop. Heterozygote advantage: how will allele frequencies change its wrr = wss < wrs, both r and s will approach an equilibrium frequency of 0. 5. Rare alleles are mostly found under heterozygotes increase in frequency till they are no longer rare. Heterozygote advantage common allele decreases in frequency. Heterozygote advantage common allele increases in frequency. Fitness of an allele can depend on its relative abundance (frequency) frequency determines whether it is in heterozygous or homozygous. Fitness of a genotype/phenotype may depend on its relative abundance. Many predators form search images and disproportionately eat commonest prey types. Which ever genotype or phenotype is rare, has selective advantage. Which ever is common, has selective disadvantage. Common forms decrease in frequency and rare forms increase in frequency.
