Write a brief account of Turner's syndrome.

Explanation

1. Turner's syndrome is a genetic disorder caused due to monosomy of X chromosome.
2. It was first described by H.H. Turner.
3. Turner's syndrome is caused due to nondisjunction of sex chromosomes which takes place during gamete formation.
4. Chromosomal complement of Turner's syndrome is `44+XO`, as having a total of 45 chromosomes.
5. Symptoms of Turner's syndrome are as follows:
(i) Female phenotype
(ii) Short stature with webbing of nect
(iii) Low posterior hair line
(iv) Secondary sexual chracters fail to develop
(v) Mental retardation.