Lecture Notes 2/11/09 Autosomes can be homozygous or heterozygous Transmission: If a trait is on an autosome there is a 50/50 chance X: men only have one loci so they are hemizygous so whatever they get on their x they have women have two so they can be heterozygous or homozygous Fathers don?t pass on to son Individuals Don?t evolve A unit of natural selection Populations evolve A ?breeding population? Find mates from same group Gene pool: sum total of alleles in a population Evolution alters the gene pools of a population Changes allele frequencies and genotype proportions If studying you need to determine whether or not the gene pool is changing Hardy-Weinberg Principle If the population is not evolving, allele frequencies and genotype proportions will remain constant from on generation to the next. H-W equilibrium Ideal population: infinitely large, mating must be random, must be free of mutation, genetic drift, gene flow, and natural selection NEVER going to happen Shows you what should be going on under ideal conditions. You can see where is it out of equilibrium
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