PS 2 answers, probs 12+13

PS 2 answers, probs 12+13 - become partially sterile do you...

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Problem 12. A) Assuming Hardy-Weinberg equilibrium, what is the frequency of the resistance allele? B) What is the frequency of the non-resistance allele? C) Of the 100,000 mosquitoes, how many are expected to be carriers of the resistance allele (heterozygous)? D) What is the frequency of the resistance allele now? The strategy here is to figure out how many resistance alleles exist in each population and divide the sum by the total number of alleles in both populations. where, was from part a, was from part b, was 1, , was 0. E) Over time, the mosquito population grew back to its natural size of 100,000. Assume there was no difference in fitness between the two alleles of the resistance gene. How many mosquitoes are expected to be resistant to malaria? F) If it turned out that being homozygous for the resistance allele caused mosquitoes to
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Unformatted text preview: become partially sterile, do you predict a change in the frequency of alleles in the population? If so, which allele would increase in frequency? Yes, the nonresistance allele would increase in frequency as partial sterility represents a change in fitness. Problem 13. A) Determine the frequency of each allele. C L = [(450x2)+500]/2000 C S = [(50x2)+500]/2000 C L = 0.7 C S = 0.3 B) Are the allele frequencies maintained at Hardy-Weinberg equilibrium? How do you know? Show your work (No need for a statistical test, just estimate). C L C L = (0.7) 2 x1000 = 490 ! 450 C L C S = 2x(0.7)(0.3)x1000 = 420 ! 500 C S C S = (0.3) 2 x1000 = 90 ! 50 NO, observed values do not equal expected Hardy-Weinberg values...
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