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JAMB Biology 1994 Question 45

Question 45

Chromosomes, DNA and Sex Linkage

The sex-linked defect in which very slight cut produces severe bleeding is known as

  1. A.anaemia
  2. B.anorexia
  3. C.haemophilia
  4. D.haemolysis.
Show the answer and explanation

Answer: C (haemophilia)

Explanation

In haemophilia the blood does not clot properly, so a small cut bleeds for a long time; the gene is on the X chromosome.