A. The X-chromosomes from fathers will not be passed along to the son. This sole X-chromosome will always be passed to their daughters. Thus, the husband will have a normal XY genotype and the wife will have an XcX genotype.
A husband and wife have normal vision, although both of their fathers are red-green color-blind, an inherited X-linked recessive condition.
A. Give the genotypes of the husband and wife.
B. What is the probability that their first child will be:
B.1. a normal son?
B.2. A normal daughter?
B.3. A color-blind son?
B.4. A color-blind daughter?
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