-
In human beings 45 chromosomes/single X/ XO abnormality causes
-
- Down's syndrome
- Kinefelter's syndrome
- Turner's syndrome
- Edward's syndrome
Correct Option: C
Turner syndrome encompassess several chromosomal abnormalities, of which monosomy X is the most common. It occurs in 1 out of every 2500 female births. Instead of the normal XX sex chromosomes for a female, only one X chromosome is present and fully functional. This is called 45,X or 45,X0, although other genetic variants occur. In Turner syndrome, female sexual characteristics are present but generally underdeveloped.
