APFIVE X-Linked Recessive Inheritance Probability
If a female who is a carrier for an X-linked recessive trait (X^cX^N) and a male who is unaffected by the trait (X^NY) have children, what is the probability that a son will be affected by the trait?
The Punnett square for this cross is provided below.
| X^N | Y | |
|---|---|---|
| X^c | X^cX^N (carrier daughter) | X^cY (affected son) |
| X^N | X^NX^N (unaffected daughter) | X^NY (unaffected son) |
A
75%
B
50%
C
25%
D
0%
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