3. In humans, hemophilia is a sex-linked recessive trait. If a female who is a carrier for hemophilia marries a male with normal blood clotting, answer the following questions. a. What fraction of the female children will have hemophilia? b. What fraction of the female children will be carriers? c. What fraction of the male children will have normal blood clotting? d. What fraction of the male children will be carriers? e. What fraction of the male children will have hemophilia? PARENT Two normal visioned parents have a color-blind son. Give the genotype of both parents and the son. PARENT

3. In humans, hemophilia is a sex-linked recessive trait. If a female who is a carrier for hemophilia marries a male with normal blood clotting, answer the following questions. a. What fraction of the female children will have hemophilia? b. What fraction of the female children will be carriers? c. What fraction of the male children will have normal blood clotting? d. What fraction of the male children will be carriers? e. What fraction of the male children will have hemophilia? PARENT Two normal visioned parents have a color-blind son. Give the genotype of both parents and the son. PARENT

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 17TYK

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4. Marfan syndrome is a genetic trait caused by in a dominant allele. The trait causes a weakening of the aorta that can be fatal. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerend that she may have the trait. a. What is the phenotype of each of her parents? Genotype? b. What is the chance that the teenager has Marfan syndrome?
3.A woman is color blind. If she marries a man with normal vision, What are the chances of her a. sons being color blind? b. daughter being color blind? c. daughter being carriers?
1. A woman who is heterozygous for hemophilia marries a man with hemophilia. What are the genotypes and phenotypes of the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
3. Hemophilia is a sex linked trait that does not allow for blood clotting normally. It is a recessive genetic defect. In the royal family, the mother of the Prince is a carrier for hemophilia. (XHXh) while the father is normal. ( XHY) . What is the genotype of the Prince if he carries the bleeder’s disease? What is the probability that all the female princesses are normal? Use the Punnett square to show your solution.
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?
1. A mother with blood type A has a child with blood type O, What is the mother's genotype? 2. A mother with blood type B has a child with blood type O. What are the possible genotype of the father?
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?
1. A mother with blood type A has a child with blood type O, and she claims that Mister X is the father. Mister X denies that he could possibly be the father, because he has blood type B. If you were the judge presiding over this case, which of the following arguments would you find most convincing? a. Mr. X could be the father if his blood genotype is IBIB, and the mother’s blood genotype is IAIA b. Mr. X cannot be the father because a child with blood type O cannot have a parent with blood type B c. Mr. X could be the father if his blood genotype is IBi, and the mother’s blood genotype is IAi d. Mr. X cannot be the father because a parent with blood type B cannot have a child with blood type O e. Mr. X cannot be the father because the human ABO blood types are sex-linked traits 2. A monohybrid cross between two pea plants producing yellow peas, resulting in an F1 phenotypic ratio of 3:1 (three yellow pea plants to one green pea plant) indicates what about the parental pea plants?…
9. The factors for normal hemoglobin (S) and sickle-cell hemoglobin (s) are considered codominants: heterozygous individuals have some normal red blood cells and some sickle cells but are not considered to have the disease. A heterozygote is said to have the sickle-cell trait but not the disease. A. What is the genotype of a man with the sickle-cell trait? B. If normal man marries a heterozygous woman, what do you expect for the genotypes and phenotypes of their children? C. If 2 heterozygous people marry and have 3 children who don’t have the disease, what is the chance that their fourth child will have the disease? D. Assume that medical science finds a treatment for sickle-cell anemia so that people with the disease can live out a normal life span but their genes are not changed. If 2 people are saved from the effects of the disease, marry, and have children, what would you expect for the genotypes and phenotypes of their children? Would the children…
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7. 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?