Question

A monosomic $(2n-1)$ abnormality in human is

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

Answer 1

The correct option is B Turner's syndrome

• Klinefelter syndrome is a sex chromosome disorder in boys and men that results from the presence of an extra X chromosome in cells
• Turner syndrome is due to a chromosomal abnormality in which all or part of one of the X chromosomes is missing or altered.
• Edwards Syndrome (also known as Trisomy 18) is a genetic disorder caused by the presence of all or part of an extra 18th chromosome.
• Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21

So, the correct answer is 'Turner's syndrome'.