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Red-green color blindness is due to an X-linked recessive allele in humans

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Red-green color blindness is due to an X-linked recessive allele in humans. A widow?s peak (a hairline that comes to a peak in the middle of the forehead) is due to an autosomal dominant allele.;Consider the following family history;A man with a widow?s peak and normal color vision marries a color-blind woman with a straight hairline.;The man?s father had a straight hairline, as did both of the woman?s parents. Use the family history to make predictions about the couple?s children.;What is the chance that any son that the couple has will be color blind with a widow's peak?;If the couple has a child, what is the chance that it will be a daughter with a widow's peak?;Suppose the couple had a daughter with normal color vision and a widow's peak. What is the chance that she is homozygous for both genes?;What is the chance that any daughter the couple has will be color blind with a straight hairline?;Choices: 1/4, 3/4, 0, 1, 1/2

 

Paper#16988 | Written in 18-Jul-2015

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