Question
Asked Nov 19, 2019
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E STAR
3. Red/green colorblindness is a sex-linked recessive trait in humans. A woman that is heterozygous for
colorblindness is married to a man who is not colorblind. Predict the ratio of the phen otypes that would be
found in their offspring. Show your work.
Ratios:
Normal vision female
Colorblind female
Normal vision male
Colorblind male
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E STAR 3. Red/green colorblindness is a sex-linked recessive trait in humans. A woman that is heterozygous for colorblindness is married to a man who is not colorblind. Predict the ratio of the phen otypes that would be found in their offspring. Show your work. Ratios: Normal vision female Colorblind female Normal vision male Colorblind male

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Expert Answer

Step 1
  • Red/green colorblindness is an X-linked recessive trait. Let’s represent the normal allele by X and allele responsible for colorblindness by XR.
  • It is a recessive trait that will be expressed only in homozygous condition in the female progeny. The male progeny requires only one XR allele to express the disease as they are he...

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