Biology, 18.09.2019 05:10 amcdonald009
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.
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what is the chance that any daughter the couple has will be color blind with a straight hairline?
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what is the chance that any son that the couple has will be color blind with a widow's peak?
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if the couple has a child, what is the chance that it will be a daughter with a widow's peak?
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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?
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Answers: 2
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