6. Which mode of inheritance results in the phenotypes of both a heterozygote and a dominant homozygote being indistinguishable? A. Incomplete dominance B. Complete dominance C. Codominance D. Epistasis E. Incomplete penetrance
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- 1. Y. Awhite Four o'clock flower is crossed with red Four o'clock flower. What will be the color of offspring? A. pink B. red C. red and white D. white Z. Why do you think so? It follows the A. ABO system B. sex-related inheritance C. codominance pattern of inheritance D. incomplete dominance pattern of inheritance 2. Y. Aheterozygous blood type Amother maried to a heterozygous blood type B father. How many chance will they have blood type O children? B. 25% A. 0% C. 50% D. 75% Z. Why do you think so? А. В. IA IA JAi ii С. D. i JA IA JA i ii TAB AB i ii i 3. Y. The grandfather has hairy-eared son. His son married a girl who gave birth to a boy. What are the chances that his grandson would be hairy eared too? A. 0% В. 25% C. 50% D. 100% Z. Why do you think so? A. Only male is the carrier of the disorder. B. Only female is the carrier of the disorder. C. Both male and female is the carrier of the disorder. D. Neither male nor female is the carrier of the disorder. 34 4. Y. More males…1. True or false? Codominance and complete dominance establish the same pattern of inheritance.1. Windows peak (S) is dominant over straight hairline (s). Given that the mother has heterozygous gene pair for window's peak and the father has straight hairline. a. What is the genotype of the mother? b. What is the genotype of the father? * How many kinds of gametes can the mother produce? List them down. d. How many kinds of gametes can the father produce? List them down. e. Perform a cross using a Punnett square. f. Give the genotypic ratio of the cross g. Give the phenotypic ratio of the cross A 4.
- 1. An albino man whose parents are both normal marries a woman ome of whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a.Is albinism a dominant or a recessive trait? Explain your answer B. Give genotypes of all the persons involved. C.The couple plans to have more kids. What is the probability of their second child being normal7. The ability to roll your tongue (R) is dominant to lack of this ability (r). A. What is the genotype of a man who can roll his tongue if his father couldn’t? B. If a man who is heterozygous for tongue rolling marries a woman who is heterozygous, what would you predict for the genotypes and phenotypes of their children?1. An albino man whose parents are both normal marries a woman one of whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b. Give the genotypes of all the persons involved. c.The couple plans to have more kids. What is the probability of their second child being normal?
- 26. Given that E=unattached earlobes and e=attached earlobes, which of the following best describes an individual that is homozygous recessive for this trait? 1. Attached earlobes; Ee 2. Attached earlobes; ee 3. Unattached earlobes; EE1. Which best describes the mode of inheritance of the afflicting allele in the following pedigree? A. autosomal dominant B. autosomal recessive C. X-linked dominant D. X-linked recessive 2. Suppose that an allele, b, of a X-linked gene is recessive and lethal (if a wild-type allele is not present). A man marries a woman who is heterozygous for this gene. If this couple had a large number of normal children, what would be the predicted sex ratio of these children (ratio of male children to female children)?A. Identify the inheritance pattern in the pedigree below (dominant, recessive or sex-linked). B. What are the genotypes for individuals Il- 1 and Ill-2? Use alleles A and/or a for your answer. 4 II 10 IV
- 6. A man with type B blood marries a woman with type A blood. They have the first child with bloodtype O.a. What are the genotypes of the father and the mother?b. What is the genotype and phenotype of the baby? 7. A man with type O blood marries a woman with type AB blood. What is the predicted genotypicand phenotypic ratios of their children?1. An albino man whose parents are both normal marries a woman one whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b.Give genotypes of all the persons involved. c. The couple plans to have more kids. What is the probability of their second child being normal?8. Huntington’s disease is a degenerative disease of the nervous system that strikes in middle age. The allele that causes the disease (H) is dominant to the allele that results in the normal condition (h). Answer the following questions about the inheritance of this disease. A. What is the genotype of a man who is normal but whose father had Huntington’s disease? B. What is the genotype of a woman who has Huntington’s disease if both of her parents had Huntington’s disease? C. If a man who is heterozygous for Huntington’s disease marries a woman who is normal, what would you expect for the genotypes and phenotypes of their children? D. If a normal man marries a woman who is homozygous for Huntington’s disease, what do you expect for the genotypes and phenotypes of their children?