Practice question

MCQ

Question

Which of the following disorders is incorrectly matched with its cause?

Options

Choose one · Correct answer highlighted

Sickle-cell anemia - Mutation in the β-globin gene. Hemophilia - X-linked recessive disorder. Turner’s syndrome - Presence of an extra Y chromosome. Correct Down’s syndrome - Trisomy of chromosome 21.

Explanation

Turner’s syndrome results from the absence of one X chromosome (45, XO), not the presence of an extra Y chromosome.

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