Question

write a short note on Down's syndrome?

Answer 1

Down's syndrome is a genetic disorder that is caused by the trisomy of 21. The trisomy means occurrence of three copies of the chromosome number 21, which occurs by non disjunction of chromosomes during gametic meiosis. An individual with Down's syndrome is characterised by webbed neck, short stature, mongoloid face, protruding tongue, bulging eyes, mental retardation and are short lived.