A woman carrying the hemophilia gene marries a healthy man. What is the probability of having sick children in this family?
| December 19, 2020 | education
A woman carrying the hemophilia gene marries a healthy man. What is the probability of having sick children in this family? The non-clotting gene is inherited as a recessive trait linked to the X chromosome. Only men are sick, and women are carriers. What do we know from the problem statement?
Given:
A-healthy
a – hemophilia
♀️XAXa
♂️XAY
Find: F1-?
Decision:
P: ♀️XAXa * ♂️XAY
G: XA XA * XA Y
F1: XAXA – 25% healthy girl
XAXa-25% healthy girl (carrier)
XAY – 25% healthy boy
XaY – 25% sick boy (hemophilic)
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