Question

breif note on down syndrome​

Answer 1

The most common form of Down syndrome is known as trisomy 21, a condition where individuals have 47 chromosomes in each cell instead of 46. Trisomy 21 is caused by an error in cell division called nondisjunction. This leaves a sperm or egg cell with an extra copy of chromosome 21 before or at conception.

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Answer 2

HEY MATE!!

Down syndrome  is a genetic disorder. People with Down syndrome have an extra copy of chromosome 21, or part of it. Down syndrome causes a mental handicap. It may be mild or severe. ... Idiocy meant intellectual disability.