Ch.7 HW - Ch.7 HW 091709 MCQs: 1) In Drosophila, sex is...

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Ch.7 HW 091709 MCQs: 1) In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of A) telomeres B) centromeres C) X chromosome D) Y chromosome E) Nucleolar organizers 2) Which chromosomal condition leads to Klinefelter syndrome? A) 47, XXY B) 47, 21+ C) 45, X0 D) 47, XYY E) Triploidy 3) A recessive gene for color-blindness is located on the X chromosomes in humans. A woman with normal vision (her father is color-blind) marries a color-blind male. What is the likelihood that their first son will be color blind? A) 25% B) 0% C) 100% D) 75% E) 50% 4) Hemophilia is caused by a sex-linked recessive gene. If a man with hemophilia marries a normal woman (whose father has hemophilia), what is the probability that they will have a daughter with hemophilia? A) 1/8 B) ½ C) ¼ D) 1/16 E) ¾ 5) For an individual with the XXY chromosomal composition, the expected number of Barr bodies is, A) two
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B) one C) zero D) variable E) three TRUE/ FALSE: 1) Normally in humans, all the sons of a female homozygous for a sex linked
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This note was uploaded on 07/04/2011 for the course BIO 325 taught by Professor Saxena during the Fall '08 term at University of Texas at Austin.

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Ch.7 HW - Ch.7 HW 091709 MCQs: 1) In Drosophila, sex is...

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