6_11_ extra problems - 70. Y-linked genes include a gene...

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70. Y-linked genes include a gene that produces hairy pinnae (the external ear). A male with hairy pinnae will pass this trait a. usually to his sons, but occasionally also to a daughter. b. only to his sons. c. only to his daughters. d. only to his grandsons. e. to all of his children if the mother is a carrier. 68.–69. Cleft chin is a sex-linked dominant trait. Assume that a man with a cleft chin marries a woman with a round chin. 68. What percent of their female progeny will show the cleft chin trait? a. 0 b. 25 c. 50 d. 75 e. 100 Textbook Reference: 10.4 What Is the Relationship between Genes and Chromosomes? p. 227 69. What percent of their male progeny will show the cleft chin trait? a. 0 b. 25 c. 50 d. 75 e. 100 67. White eyes is a recessive sex-linked trait in fruit flies. If a white-eyed female fruit fly is mated to a red-eyed male, their offspring should be a. 50 percent red-eyed and 50 percent white-eyed for both sexes. b. all white-eyed for both sexes. c. all white-eyed males and all red-eyed females. d. all white-eyed females and all red-eyed males. e. 50 percent red-eyed males and 50 percent white-eyed males and all red-eyed females. 66. A human male carrying an allele for a trait on the X chromosome is a. heterozygous. b. homozygous. c. hemizygous. d. monozygous. e. holozygous. 47. A mutation at a single locus causes a change in many different characters. This an example of a(n) _______ effect. a. polygene b. epigenetic c. cytoplasmic
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d. multiple negativity e. pleiotropic 44. The ABO blood groups in humans are determined by a multiple allelic system in which I A and I B are codominant and are dominant to i O . If an infant born to a type O mother also is type O, possible genotypes for the father are a. O or A. b. A or B. c. O only. d. O, A, or B. e. impossible to determine. 43. If the same allele has two or more phenotypic effects, it is said to be a. codominant. b. a marker. c. linked. d. pleiotropic.
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This note was uploaded on 12/03/2011 for the course CHEM 2211 taught by Professor Facundofernandez during the Fall '09 term at Georgia Institute of Technology.

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6_11_ extra problems - 70. Y-linked genes include a gene...

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