Q.

A human female with Turner’s syndrome                  [2014]

1 has 45 chromosomes with XO  
2 has one additional X chromosome  
3 exhibits male characters  
4 is able to produce children with normal husband.  

Ans.

(1)

A human female with Turner’s syndrome has single sex chromosome i.e., 44 + X0 (45). Such females are called sterile females with rudimentary ovaries. Other associated phenotypes of this condition are short stature, webbed-neck, broad chest, lack of secondary sexual characteristics and sterility. Thus, any imbalance in the copies of the sex chromosomes may disrupt the genetic information necessary for normal sexual development.