Which disease is X-linked recessive?
Answer and explanation
Correct answer: B. Haemophilia A
- Step 1: Haemophilia A is caused by a recessive allele on the X chromosome, so it affects males more often. Answer: Haemophilia A. Why not the others: Cystic fibrosis, Huntington's disease and Sickle-cell anaemia don't fit.
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