Question

Mention the chromosonal abnormality associated with the following condition in human?
1. Turnen syndrome
2. Down syndrome
3.kline felter's syndrome

Answer 1

1. Turnen syndrome:-
*in this there is mutation in the chromosome
it's the condition of monosomy of sex chromosomes.
i.e. 2n = 45
= (44+x0)
.such individuals are sterilize male or female due to undeveloped sex organs.

2. Down's Syndrome:-
*in this, there is mutation in chromosome
it's is condition of trisomy of 21st chromosome i.e. 2n = 47
symptoms....
- partially opened mouth
- furrowed tongue
- congenital heart disease
- characteristics palm grease
- stunned growth
- mental retardness

3. Klinefelter's syndrome:-
in this there is mutation of chromosome
it's the case of trisomy of X-chromosome.
2n= 47
= (44+XXY)
such individuals are male with female characters for example feminine voice develop breast this condition is known as "Gynaecomastia"
so such individuals are usually sterile.