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Unformatted text preview: vial = population size), then the frequency of the fixed allele would be less close to 50% at the end of the experiment. i) Each vial is like a coin toss less vials, greater variance in fixing for bw allele or bw75 allele. ii) Genetic drift, not only adaptations, can cause differences among populations. iii) If started with not 50% each easier to fix for bw75 2) Inbreeding Depression Mating with relatives, offspring often suffer from reduced fitness. Can also happen if a single fly spawns a colony, t+1 is all inbreeding. i) Assortitive Mating b) Mutations often cause loss of function (recessive) alleles, ie) deleterious recessives. c) Individuals homozygous for deleterious recessive alleles (because it is a diploid, this can happen) have reduced fitness. One copy of the deleterious wild-type recessive most likely wont cause deleterious effects, but two together will....
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- Spring '09