Bio1202-quiz1

Bio1202-quiz1 - 1 Marks: 1/1 Use the following information...

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1 Marks: 1/1 Use the following information to answer the questions below. In a hypothetical population of 1,000 people, tests of blood-type genes show that 160 have the genotype AA , 480 have the genotype AB , and 360 have the genotype BB . What is the frequency of the B allele? Choose one answer. a. 0.001 b. 0.002 c. 0.100 d. 0.400 e. 0.600 Correct Marks for this submission: 1/1. Question 2 Marks: 1/1 Use the following information to answer the questions below. A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 36% of the animals display a recessive trait ( aa ), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants. What is the most reasonable conclusion that can be drawn from the fact that the frequency of the recessive trait ( aa ) has not changed over time? Choose one answer. a. The population is undergoing genetic drift. b. The two phenotypes are about equally adaptive under laboratory conditions. c. The genotype AA is lethal. d. There has been a high rate of mutation of allele A to allele a. e. There has been sexual selection favoring allele a. Correct Marks for this submission: 1/1. Question 3 Marks: 1/1 Adult male vervet monkeys have red penises and blue scrotums. Males use their colorful genitalia in dominance displays wherein they compete with each other for access to
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females. The coloration of the male genitalia is best explained as the result of ________, and specifically of ________. Choose one answer. a. natural selection; stabilizing selection b. disruptive selection; intrasexual selection c. sexual selection; intrasexual selection d. natural selection; intersexual selection e. sexual selection; disruptive selection Correct Marks for this submission: 1/1. Question 4 Marks: 1/1 During drought years on the Gal pagos, small, easily eaten seeds become rare leaving only large, hard-cased seeds that only birds with large beaks can eat. If a drought persists for several years, then what should one expect to result from natural selection? Choose one answer. a. Small birds gaining larger beaks by exercising their mouth parts.
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Bio1202-quiz1 - 1 Marks: 1/1 Use the following information...

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