22 consider a locus in which the fitness of aa and aa

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Biology: The Dynamic Science
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Chapter 21 / Exercise 3
Biology: The Dynamic Science
Hertz/Russell
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22. Consider a locus in which the fitness of AA and Aa genotypes are greater than the fitness of aa genotype. In addition, this locus experiences forward mutation from the allele to a allele. At this locus, the A allele will A a. always go to fixation. b. always be lost. c. never go to fixation. d. never change. e. None of the above
23. Inbreeding depression is caused by
24. As the value of F increases, so does the frequency of .
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Biology: The Dynamic Science
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Chapter 21 / Exercise 3
Biology: The Dynamic Science
Hertz/Russell
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25. Disassortative mating may be beneficial because
26. A researcher examines a microsatellite locus in a wild population of D. melanogaster He finds that in a sample of 50 individuals, 20 different alleles are segregating. The best explanation for the presence of all of these alleles is . a. balancing selection. b. mutation. c. The neutral theory d. overdominance. e. the law of large numbers.
27. Imagine that, of three species, it is known that species 1 and 3 were separated 10 million years ago, based on geologic measurements. Genetic analysis at a neutral locus indicates that these species differ by 100 substitutions. If there are 10 substitutions separating species 1 and 2, approximately how long ago did these species diverge?
28. Which of the following graphs depicts most likely the group with the largest populations?
29. What are the observed /expected heterozygosities in a population that has three genotypes with the following occurrences: f ( A 1 A 1 ) = 100, f ( A 1 A 2 ) = 25, f ( A 2 A 2 ) = 100.
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30. What are the distinguishing features of the hominin lineage? a. Bipedalism and dentition c. Big brains and dentition b. Bipedalism and big brains d. Big brains only
31. What was the major transition from archaic hominins to the genus Homo?
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