DOWN'S SYNDROME - Khadija 5°E

Down's syndrome is a genetic disorder due to the presence of an extra chromosome 21 in every cell. 

The cause is still unknown but we know that there are three types of chromosome abnormalities: trisomy 21, translocation and mosaicism.

Some physical features of people with Down's syndrome are: slanting of the eyelids, decreased muscle tone, small ears, mouth, hands and feet.

The physical features do not cause any severe disability.