What is Down’s Syndrome ?

Down’s Syndrome

Down’s Syndrome is a birth defect caused by the presence of a supernumerary chromosome on the 21st pair. Instead of having a total of 46 chromosomes as is habitual, a person with Down’s syndrome has 47.

Normally, men and women have 23 pairs of chromosomes : two X chromosomes for women and an X and Y for men.

The presence of these 3 chromosomes on the 21st has consequences but does not deprive them of skills and abilities.

A person with Down’s syndrome
has 47 chromosomes Instead of 46

1 per 700 births

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