The probability of a child being a male and colorblind when a colorblind man and carrier woman have a child is 50% due to the X-linked nature of colorblindness.
Colorblindness is a sex-linked recessive disorder found on the X chromosome in humans. In this scenario, if a man who is colorblind (XY) and a woman who is a carrier for colorblindness (XX) have a child, the probability that the child will be male and colorblind is 50%. This is because the son has a 50% chance of inheriting the defective X chromosome from the carrier mother, resulting in colorblindness as colorblindness is X-linked
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