problem_set_6_f07

problem_set_6_f07 - C) What are the frequencies of the...

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Problem set for population genetics section Biocore 301- Fall 2007 Due Wednesday November 21 in lecture Johanne Brunet 1. A population of plants is segregating for two alleles, A and a at the anthocyanin gene. In a sample of 120 plants, 60 were AA homozygotes, 30 were Aa heterozygotes and 30 were aa homozygotes. a) What are the frequencies of each of the three genotypes in the population? B) What are the frequencies of the A and the a alleles in the population? C) Is the population at Hardy Weinberg equilibrium (show all your steps and reasoning for these calculations)?
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2. The frequencies of the alleles A and a are 0.35 and 0.65 respectively in a particular insect population. After many generations of random mating, the population goes to complete self- fertilization. A) What are the frequencies of the genotypes in the original population (before any selfing takes place? B) What are the frequencies of the genotypes after one generation of selfing?
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Unformatted text preview: C) What are the frequencies of the genotypes after two generations of selfing? D) What will the equilibrium genotype frequencies be if the individuals keep selfing? E) What will the equilibrium gene frequencies be assuming that the individuals keep selfing? 3. In controlled experiments with different genotypes a researcher has measured the number of offspring produced by each genotype. The original population is at Hardy Weinberg equilibrium with gene frequencies p = q = 0.5. If all genotypes have the same probability of survival and genotype GG produces 50 eggs, genotype Gg 30 eggs and genotype gg 15 eggs a) what are the relative fitnesses of the three genotypes? B) What are the selection coefficients against the two least fit genotypes? C) What are the genotype frequencies after one cycle of selection? D) What are the gene frequencies after one cycle of selection? Show your calculations....
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problem_set_6_f07 - C) What are the frequencies of the...

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