Question

Which has an additional X-chromosome?

• A. Turner's syndrome
• B. Klinefelter's syndrome
• C. Super female
• D. Down's syndrome

Answer 1

Answer: (B)

Klinefelter's syndrome

Klinefelter's syndrome also known as 47, XXY or XXY is a genetic disorder that affects males. It occurs when a boy is born with one or more extra X chromosomes. The primary feature is sterility. Other symptoms include weaker muscles, greater height, poor coordination, less body hair, smaller genitals and breast growth. Hence, option B is correct.