Most Cases of Colorblindness Result from Abnormal Recessive Genes Located

question 72

Multiple Choice

Most cases of colorblindness result from abnormal recessive genes located on the X chromosome that are not duplicated on the Y chromosome.Which of the following statements accurately predicts the outcome for the children of a father with typical genes and a mother with abnormal genes?​ 

• A)Half of the couple's daughters, but none of their sons, are likely to be colorblind. 
• B)Half of the couple's sons, but none of their daughters, are likely to be colorblind. 
• C)None of the couple's children are likely to be colorblind. 
• D)All of the couple's children are likely to be colorblind.

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