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Download Practice Genetics questions 1. In human`s tongue rolling is an
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Practice Genetics questions 1. In human’s tongue rolling is an autosomal dominant trait. T or F a. The gene responsible for this characteristic is present on one of the human chromosomes 1 through 22. T or F b. The gene responsible for this characteristic is present on one of the human X chromosome Use this information above to answer the following questions. A woman who is a tongue roller has a daughter who is not a tongue roller. Use R to represent the dominant allele and r to represent the recessive allele. 2. How many alleles for tongue rolling are there in each individual? a. one b. two 3. The daughter’s genotype is a. RR b. Rr c. either RR or Rr d. rr 4. The daughter has a a. homozygous dominant genotype. b. heterozygous c. homozygous recessive 5. The mother’s genotype is a. RR b. Rr c. either RR or Rr d. rr 6. The mother has a a. homozygous dominant b. heterozygous c. homozygous recessive genotype. d. either a or b e. either b or c Albinism is an autosomal recessive trait. A couple with normal pigmentation have a an albino child. They are pregnant with the second child. 7. What is the probability or chance that their second child would have normal pigmentation? a. 0 b. ¼ c. ½ d. ¾ d. 1 8. What is the probability or chance that their second child would also be an albino? a. 0 b. ¼ c. ½ d. ¾ d. 1 9. Red/Green color blindness is an X-linked recessive trait. A woman with normal color vision whose father is color blind is married to a spouse with normal color vision. What is the chance that their child would be color blind if it is a girl? a. 0 b. ¼ c. ½ d. ¾ d. 1
