Red-green color blindness in humans is inherited as an X-linked recessive condition. Consider reciprocal crosses between a color-blind parent and a parent with normal color vision in which the dominant allele is identified as C and the recessive allele as c.
Cross I is Cc×cY.
Cross II is cc×CY.
Determine the phenotypes and their proportions in progeny produced by cross I.
Determine the phenotypes and their proportions in progeny produced by cross II.