A normal woman with a color-blind father married a normal man, and their first child, a boy, had hemophilia. Both color-blindness and hemophilia are due to X-linked recessive mutations, and the relevant genes are separated by 10 cM. This couple plans to have a second child. For each female and male, what is the probability that it will have hemophilia? color-blindness? both hemophilia and color-blindness? neither hemophilia nor color-blindness?

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Jamar FerryLv2

4 Oct 2018

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Colorblindness and hemophilia A both recessive traits. The two genes are located 10cM apart on the X chromosome. A phenotypically normal man with no family history of either disease is married to a phenotypically normal woman, whose father has hemophilia A and mother is colorblind. If this couple has a son..

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