BIOL 121 (2012) Spring Exam 3

For each of the possibilities listed below indicate

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Unformatted text preview: AT MOST – ARE NEEDED FOR A COMPLETE ANSWER Please enter your answers in the space provided. 10) Name the model of natural selection that best explains the following data for each scenario listed below. A) Homozygous individuals are consistently less frequent than expected (over several generations) given the Hardy- Weinberg model. (4 pts) B) A mutation causing the smooth phenotype increases in frequency nearly every generation and eventually replaces the wrinkly phenotype. (4 pts) C) The allele causing the smooth phenotype increases in frequency nearly every generation until it is more common than the wrinkly phenotype and then decreases in frequency nearly every generation until it is less frequent. (4 pts) D) The allele causing the smooth phenotype increases in frequency nearly every generation even though it increases the mortality rate. (4 pts) E) A mutation causing the smooth phenotype is quickly eliminated from the population. (4 pts) 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....
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