Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. If Bill and Martha marry, what proportions of children with specific phenotypes would they be expected to produce? The answers only include the proportions of some of the possible phenotypes; other phenotypes are also expected to occur but are not included. Assume full penetrance for both traits. Select one: a. 1/8 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly b. 1/4 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly c. 1/8 color-blind girls with normal fingers, 1/8 boys with normal vision and polydactyly d. 1/4 color-blind girls with normal fingers, 1/8 boys with normal vision and polydactyly

Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. If Bill and Martha marry, what proportions of children with specific phenotypes would they be expected to produce? The answers only include the proportions of some of the possible phenotypes; other phenotypes are also expected to occur but are not included. Assume full penetrance for both traits. Select one: a. 1/8 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly b. 1/4 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly c. 1/8 color-blind girls with normal fingers, 1/8 boys with normal vision and polydactyly d. 1/4 color-blind girls with normal fingers, 1/8 boys with normal vision and polydactyly

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....

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Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extrafingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normalcolor vision. Her mother is normal in all respects, but her father is color blind andpolydactylous. Bill is color blind and polydactylous. His mother has a normal color vision andnormal fingers and toes. If Bill and Martha marry, what types and proportions of children canthey produce?
Both red/green color blindness (R=normal, r=colorblind) and Duchenne-type muscular dystrophy (D=normal, d=muscular dystrophy) are X-linked recessive traits that map close to each other. A woman has a father who is red/green color blind. Her mother's family has a history of Duchenne's muscular dystrophy. This woman is apparently healthy with neither color blindness nor muscular dystrophy. She marries a healthy man and they have four sons and two daughters. Half the sons are healthy but color blind, the other half have normal color vision, but have Duchenne's muscular dystrophy. The daughters are both normal. What is the genotype of the woman? ** The notation is written as X/X (so the / separates the two X chromosomes in a female) Group of answer choices RD/rd rd/rd Rd/rD RD/RD
Red–green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. If Bill and Martha marry, what phenotypes and proportions of children can they produce?
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