How Does Color Blindness Genetics Affect Offspring?

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Color blindness, particularly red-green color blindness, is linked to a sex-linked gene 'c'. In a scenario where a normal woman with a color-blind father marries a color-blind man, the mother's possible genotypes include XcX or XX. The likelihood of their first child being a color-blind boy is 50%, as the son inherits the Y chromosome from the father and one X chromosome from the mother. Daughters from this couple have a 50% chance of being color-blind, as they inherit one X chromosome from each parent. Understanding these genetic probabilities is crucial for predicting color blindness in offspring.
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1. A sex linked gene 'c' produces red-green color blindness in humans. A normal woman whose father is color-blind marries a color-blind man. What genotype(s) are/is possible for the mother of the color-blind man she has married?

a. What are the chances that the first child from this marriage will be a color-blind boy?

b. Of the daughters of these parents, what fraction are expected to be color-blind?
 
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