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ExamsNEETBiology

This condition arises from a recessive mutation on the X chromosome. Males are affected because they possess only one X chromosome, making them express traits linked to it.

  1. Cretinism
  2. Cystic fibrosis
  3. Haemophilia
  4. Thalassemia

Correct answer: Haemophilia

Solution

Haemophilia is classically inherited as an X-linked recessive trait, so males with one mutated X chromosome express the disorder. The other options are not X-linked recessive conditions.

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