BIOEE 1780 Study Group -- Practice Final (SMJ)

An evolia has two major steps first to describe how

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Unformatted text preview: TTT AT TAG CAT GAT TTA TAT 31. In the coral and kingsnake system that you read about for section, which evolutionary process would tend to cause mimicry to break down in allopatry? a) Natural selection b) Mutation c) Genetic drift d) Non- random mating and genetic drift e) Genetic drift and migration 8 32. Which type of mutation is LEAST likely to have a large impact on fitness? a) synonymous b) non- synonymous c) nonsense d) frame- shift e) chromosomal inversion 33. Which of the following is NOT a potential source of new genetic variation within a population? a) environmental change b) horizontal gene transfer c) hybridization d) mutation e) duplication of transposable elements within the genome 34. Consider the following genotypes and the number of identical offspring each genotype produces (on average) per year. What is the relative fitness of each genotype? genotype: offspring: M 0 N 4 relative fitness M N O O P 2 8 P a) 0.1 0.4 0.25 0.8 b) 0.0 0.4 0.25 0.8 c) 0.0 0.4 0.25 1.0 d) 0.0 0.5 0.25 1.0 e) insufficient information given 35. Considering the same data given above in question 34, what is the selection coefficient for each of the four genotypes? M N O P a) 1.0 0.6 0.75 0.2 b) 1.0 0.6 0.75 0.0 c) 1.0 0.5 0.75 0.0 d) insufficient information given 36. Imagine that you measure beak size in Darwin’s finches before and after a long drought. You find no change in the mean beak size in your island population when you compare your pre- and post- drought measurements. Which of the following is LEAST likely to have occurred: a) Directional selection b) Stabilizing selection c) Disruptive selection 9 37. Following the same scenario as in question 36 above, imagine that the mean beak size does not change, but that you find more variation (e.g., more spread of measurements around the mean) in the post- drought population. What type of selection most likely occurred? a) Directional selection b) Stabilizing selection c) Disruptive selection 38. You will recall that in population genetics, Fst is the proportion of the variance in allele frequencies that is ascribable to differences among subpopulations (hence Fst varies from 0 to 1). Imagine two subpopulations of equal size that are exchanging equal numbers of migrants per g...
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This note was uploaded on 02/03/2014 for the course BIOEE 1780 taught by Professor Harrison during the Spring '10 term at Cornell.

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