Question 54
Chromosomes, DNA and Sex LinkageWhich disease is sex-linked and mainly afflicts male offspring?
- A.Sickle cell anaemia
- B.Haemophilia
- C.Diabetes
- D.Malaria
Show the answer and explanation
Answer: B (Haemophilia)
Explanation
The haemophilia gene is on the X chromosome; males have only one X, so one faulty copy gives them the disease.