MG-section_week_12-answers

MG-section_week_12-answers - 7. TA:MikeGavio OH:Tuesday78pm...

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7.03 Recitation -- Section Week 12 TA: Mike Gaviño Email: [email protected] OH: Tuesday 7-8pm Concept questions from Lectures #29, 30: 1. What is population genetics? What does allele frequency refer to? Genotype frequency? How are each of these calculated? 2. What is Hardy-Weinberg equilibrium? What assumptions must be made for this equilibrium to exist? 3. What is selection? What is relative fitness? Selective disadvantage? How do these terms relate to one another? How does mutation frequency relate to selective disadvantage at H-W equilibrium? 4. How is the change in allele frequency due to selection calculated when a population is not at H-W equilibrium? What is the population mean fitness? 5. How is the change in allele frequency due to mutation calculated when a population is not at H-W equilibrium? Questions based on Lectures #29, 20: Hardy-Weinberg in a one-gene system with more than two alleles: Say that there are 3 alleles of a gene in a population that is in Hardy-Weinberg equilibrium. The alleles are C, D, and E and you define f(C) = p, f(D) = q, and f(E) = r. Express all allele frequencies in terms of genotype frequencies. f(C)= f(CC) + 1/2 f(CD) + 1/2 f(CE) f(D)= f(DD) + 1/2 f(DC) + 1/2 f(DE) f(E)= f(EE) + 1/2 f(DE) + 1/2 f(CE) Express all genotype frequencies in terms of allele frequencies. F(CC)= p^2
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MG-section_week_12-answers - 7. TA:MikeGavio OH:Tuesday78pm...

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