Question

A person who is monosomic for X-chromosome has

• A. Down's syndrome
• B. Patau's syndrome
• C. Turner's syndrome
• D. Edward's syndrome

Answer 1

The correct option is C Turner's syndrome

Monosomy is the state in which an organism has a single copy of a chromosome pair instead of the usual two copies found in diploid cells. The organism suffering from monosomy is called monosomic.

Turner's syndrome occurs when one of the X chromosomes (sex chromosome) is missing. It is also called monosomy X. Only the female develops this condition.

Down's syndrome also known as trisomy 21, is a genetic disorder caused by the presence of a third copy of chromosome 21.

Patau's syndrome is a syndrome caused by a chromosomal abnormality, in which the body contain extra genetic material from chromosome 13.

Edward's syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on the 18th chromosome (trisomy 18).