Question

Down's syndrome is a typical case of

Answer 1

gene mutation is the answer

Answer 2

Downs syndrome is also called "Trisomy 21"
It is a chromosomal disorders due to an error in nuclear division which involves a pair of chromosome that failed to separate and are carried out to one pole....
Symptoms of Down's syndrome
=> Short, broad hands , decreases muscle tone , mental retardation, broad head, open mouth with large trunk......