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20 June, 21:19

A man and a woman have a son that is colorblind. What are possible genotypes of the parents?

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  1. 20 June, 21:22
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    When he has a child, he will either pass his X or his Y down. If he passes the X, he will have a daughter and if he passes his Y, he will have a son. If they had two X's with the color blind DNA, they'd be color blind too. These daughters are carriers, they have one of each type of X
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