1. 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. Bill and Martha are married and about to have a child. a. Draw out a pedigree for all people mentioned in this problem. Fill in the left side of the box for anybody who is colorblind and fill in the right side of the box for anybody who is polydactyl. b. Determine the genotypes of Bill and Martha (it should look something like XBYDD) c. What is the probability that they will have a colorblind son with normal fingers?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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1. 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. Bill and Martha are married and about to have a child.
a. Draw out a pedigree for all people mentioned in this problem. Fill in the left side of the box
for anybody who is colorblind and fill in the right side of the box for anybody who is polydactyl.
b. Determine the genotypes of Bill and Martha (it should look something like XBYDD)
c. What is the probability that they will have a colorblind son with normal fingers?
Transcribed Image Text:1. 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. Bill and Martha are married and about to have a child. a. Draw out a pedigree for all people mentioned in this problem. Fill in the left side of the box for anybody who is colorblind and fill in the right side of the box for anybody who is polydactyl. b. Determine the genotypes of Bill and Martha (it should look something like XBYDD) c. What is the probability that they will have a colorblind son with normal fingers?
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