If a mother is a carrier for color-blindness and her husband is not color-blind, what are the probable genotypes of the children?
A. one normal daughter, one carrier daughter, one normal son, and one color-blind son
B. two carrier daughters, one normal son, and one color-blind son
C. one normal daughter, one carrier daughter, and two normal sons
D. two normal daughters, one normal son, and one color-blind son
E. one normal daughter, one carrier daughter, and two color-blind sons
Answer: A
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