Question

A human male with an extra X-chromosome suffers from a condition called ______.

Options

• Down’s syndrome

• Haemophilia

• Kliefelter’s syndrome

• Turner’s syndrome

Answer 1

A human male with an extra X-chromosome suffers from a condition called kliefelter’s syndrome.

Explanation:

The condition where a human male has an extra X-chromosome is called Klinefelter’s syndrome. It is characterized by a 47, XXY karyotype, leading to a phenotypically male individual who is often sterile, mentally defective, with underdeveloped testes and sparse body hair.