Biology for IGCSE & O level - Inheritance (Section 11 - No. 43)
What is the probability of getting a child with an X-linked recessive disorder if the mother is a carrier and the father is unaffected?
0%
25%
50%
75%
คำอธิบาย
Each son has a 50% chance of inheriting the affected X chromosome, hence the probability is 25%