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Study_questions_week-1_13

The frequency in the gene pool of the mutation

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76) The frequency in the gene pool of the mutation causing brown color at the beginning of 2008 was: A) 0.1 B) 0.2 C) 0.5 D) 0.6 E) 0.9
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77) In 2008, the Darwinian fitness of the transparent water fleas was: 78) Assuming that environmental conditions stay the same, eventually (after many generations): 79) Suppose that another mutation occurred that caused the water flea to secrete an energetically costly toxin that killed many of its predators. The secreted toxin helped the entire population of water fleas in the pool to the same degree, not just the mutated individual, and the average fitness of the population was increased by 50% due to lower levels of predation. The mutation would: 80) Suppose that field data showed that, in winters with intermediate rainfall, i) the average survival of transparent water fleas was 50% and that of brown water fleas was 25%, and ii) the average lifetime fecundities of the two types were 2 eggs and 4 eggs for brown and transparent water fleas respectively. These data indicate that in years with intermediate rainfall: A) Transparent genotypes would be better gene transport machines. B) Transparent phenotypes would be better gene transport machines. C) Brown phenotypes would be better gene transport machines. D) Brown genotypes would be better gene transport machines. E) None of these answers are correct. Use the following information for the next 5 questions (until you see a solid line): Suppose that a new pharmaceutical drug was developed that prevented the HIV virus from integrating its chromosomes into human chromosomes. 81) In a person taking this drug, you would expect to find (in at least some of the specified cells):
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