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| 1. |
A haplotype is best defined as
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| 2. |
A group of 20 chromosomes has the following number of each of four haplotypes: 8 AB, 2 Ab, 8 aB, and 2 ab. Correctly identify each of the following.
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Using the pulldown boxes, match each item on the left to the corresponding item at right.
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| A. 0.8 |
| B. 0.4 |
| C. 0.5 |
| D. 0.04 |
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| 3. |
When two loci are in linkage equilibrium, the allele carried on a chromosome at one locus is independent of the allele carried on the chromosome at another locus. When this is the case,
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| 4. |
Selection on multilocus genotypes in random-mating populations leads to linkage disequilibrium when
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| 5. |
Briefly explain why, like selection on multilocus genotypes, drift and population admixture can cause linkage disequilibrium.
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To create paragraphs in your essay response, type <p> at the beginning of the paragraph, and </p> at the end.
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| 6. |
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| 7. |
The graphs below show the results of Betancourt and Presgraves' analysis of protein divergence and recombination in two species of Drosophila. dN refers to the rate of amino acid divergence (replacement); dS
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| 8. |
Stephens et al. measured linkage disequilibrium between the CCR5 locus and two adjacent non-coding loci on the same chromosome. They were able to use this information to estimate
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| 9. |
Assuming the findings of Stephens et al. about the origin of the delta-32 CCR5 allele are correct, briefly explain why we think this allele must have been under strong selection.
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To create paragraphs in your essay response, type <p> at the beginning of the paragraph, and </p> at the end.
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| 10. |
The genetic signature of recent positive selection on a locus is
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| 11. |
List the two assumptions of Maynard Smith's null model for the evolutionary fate of a population in which some females reproduce sexually and others reproduce asexually. If those assumptions are met, what outcome does the model predict?
[Hint]
To create paragraphs in your essay response, type <p> at the beginning of the paragraph, and </p> at the end.
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| 12. |
Each graph represents one of Dunbrack et al's experimental populations of Tribolium beetles. Correctly match each graph with the description of its experimental treatment.
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Using the pulldown boxes, match each item on the left to the corresponding item at right.
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| 13. |
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| 14. |
Which of the following accurately characterize(s) Muller's ratchet model for the selective advantage of sexual reproduction?
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| 15. |
Which of the following correctly characterize(s) the "changing environment" hypothesis for the selective advantage of sexual reproduction?
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| 16. |
A group of 20 chromosomes has the following number of each of four haplotypes: 8 AB, 2 Ab, 8 aB, and 2 ab. Correctly identify each of the following.
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Using the pulldown boxes, match each item on the left to the corresponding item at right.
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| A. 0.04 |
| B. 0.8 |
| C. 0.4 |
| D. 0.5 |
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Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.
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