13. Cystic fibrosis is caused by a recessive lethal gene and can be detected by an excess concentration of chloride in sweat. If a sweat test reveals a man to be heterozygous and his wife to be homozygous normal, what are the chances that their children will have the disease? Could any of their grandchildren have the disease?

13. Cystic fibrosis is caused by a recessive lethal gene and can be detected by an excess concentration of chloride in sweat. If a sweat test reveals a man to be heterozygous and his wife to be homozygous normal, what are the chances that their children will have the disease? Could any of their grandchildren have the disease?

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter14: Chromosomes And Human Inheritance

Section: Chapter Questions

Problem 6SQ: Choose the statement that is incorrect. a. A son can inherit a recessive allele on an X chromosome...

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Similar questions

A female child inherits one X chromosome from her mother and one from her father. What sex chromosome does a male child inherit from each of his parents?
Choose the statement that is incorrect. a. A son can inherit a recessive allele on an X chromosome from either parent. b. An individual may inherit three or more of each type of chromosome characteristic or the species, a condition called polyploidy. c. A female child inherits one X chromosome from her mother and one from her father. d. Pedigree analysis can be used to determine a future childs chance of being born with achcondroplasia.
The part of meiosis that is similar to mitosis is ___________ . meiosis I anaphase I meiosis II interkinesis
17.Which among the following statement is NOT TRUE about the theory of inheritance? A. The paternal and maternal chromosomes assort randomly during meiosis. B. Genes are transmitted from parent to offspring via chromosomes. C. Gametes contain either a maternal set of chromosomes only or a paternal set of chromosomes only. D. An offspring receives one allele from the first parent and another allele from the other parent, giving the offspring two alleles.
1. Describe how a cross between two closely related organisms may result in genetic problems.
6. What is the unit of transmission during Meiosis? A. chromatids B. genes C. alleles D. chromosomes
7. In a disputed parentage case, the child is blood type O, while the mother is blood type A. What blood type would exclude a male from being the father? Would the other blood types prove that a particular male was the father?
4. A man with blood type A and a women with blood type B have three children. A daughter with AB and two sons, one with type B and one with type O blood. What are the genotypes of the parents?
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.
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?
1. What is example of sex-linked inheritance? Give also its definition.
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?…