1 A) homogametic B) heterogametic C) hermaphroditic D) pseudohermaphroditic 2 A) True B) False 3 A) SRY; X B) SRY; Y C) XIST; X D) sex; Y 4 A) sustentacular; Sertoli B) sustentacular; interstitial C) Leydig; Sertoli D) DHT; sustentacular 5 A) female exterior, male interior, and male genotype B) male exterior, female interior, and female genotype C) female exterior, female interior, and female genotype D) male exterior, male interior, and female genotype 6 A) male B) female C) hermaphrodite D) mosaic 7 A) male specific regions B) pseudoautosomal regions C) sites of deletions D) sex-determining regions 8 A) transcription factor gene that stimulates male development B) pseudoautosomal regions for meiosis C) gene for testosterone production D) cause of pseudohermaphroditism 9 A) not inherited B) partially inherited C) completely inherited D) completely environmental 10 A) autosomal dominant B) autosomal recessive C) X-linked dominant D) X-linked recessive 11 A) 0% B) 25% C) 50% D) 100% 12 A) 0% B) 25% C) 50% D) 75% 13 A) 0% B) 25% C) 50% D) 75% 14 A) She should blame the reactor accident because the radiation caused the hemophilia. B) She should not blame the accident because she may carry the hemophilia allele. C) Her husband should sue for divorce because it cannot be his child. D) Further genetic tests should be done to determine who is at fault. E) Hemophilia is environmentally induced, not genetic. 15 A) ichthyosis B) colorblindness C) sickle-cell anemia D) a and c 16 A) 1/8 B) 1/4 C) 1/2 D) 1 17 A) homozygous normal female x normal male B) affected female x affected male C) affected female x normal male D) heterozygous normal female x affected male 18 A) Yes, if the trait is recessive B) Yes, if the male's father and mother were carriers C) No, males have only a single copy of sex-linked genes D) No way to predict 19 A) homozygous B) heterozygous C) hemizygous D) pseudozygous 20 A) always expressed in the female B) passed from heterozygote or homozygote mother to son C) expressed in a female homozygote D) affected female has an affected father and an affected or heterozygous mother 21 A) are manifesting heterozygotes B) show a mosaic pattern of expression C) display a sex-limited trait D) a and b 22 A) 0 B) 1 C) 2 D) 3 23 A) The X chromosome contains few genes while autosomes contain a large number. B) The extra X chromosome(s) are inactivated. C) The X chromosome determines sex only. D) None of the above 24 A) It occurred early. B) It occurred late. C) It occurred both early and late. D) No relationship exists. 25 A) XB Xb B) XB Y C) Xb YY D) XB Xb Y 26 A) sex-linked B) sex-limited C) sex-influenced D) Y-linked 27 A) sex-linked trait B) trait determined by mitochondrial DNA C) sex-limited trait D) sex-influenced trait 28 A) sex-linked B) sex-influenced C) sex-limited D) Y-linked 29 A) heteroplasmy B) uniparental disomy C) Y-linked D) none of the above, infidelity is the only plausible explanation 30 A) genomic imprinting B) nuclear inheritance C) Mendelian inheritance D) heteroplasmy 31 A) Traits are transmitted from father to son. B) There are no affected females. C) Traits that involve infertility are not transmitted. D) Traits are transmitted from mother to son. 32 A) his mother only B) his father only C) both his mother and father D) Males do not have X-linked traits. 33 A) XB Y B) 2 XB YB C) Xb Y D) XB XB 34 A) her mother only B) her father only C) both her mother and father D) Females do not have X-linked traits. 35 A) XB XB B) XB Xb C) Xb Xb D) Xb Y
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