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BIOL 121 (2012) Spring Exam 3 + Key

Changing the amount of cap protein would not

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Unformatted text preview: otype and then decreases in frequency nearly every generation until it is less frequent. (4 pts) Frequency dependent selection D) The allele causing the smooth phenotype increases in frequency nearly every generation even though it increases the mortality rate. (4 pts) Sexual selection E) A mutation causing the smooth phenotype is quickly eliminated from the population. (4 pts) Stabilizing selection 5 BIOL 121 Exam 3 4/23/12 NAME: 11) You isolate an E. coli mutant that transcribes the lac operon at very high levels when cells are growing in medium containing lactose and glucose. For each of the possibilities listed below, indicate whether or not the mutation COULD account for the above phenotype (Yes = the mutation could account for the phenotype, No = the mutation cannot account for the phenotype). Briefly explain why in each case. A) A mutation in the coding sequence of the gene encoding CAP....
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