Down+Syndrome-Description

Return to Down Syndrome Home Page

Return to Genetic Disorders List

Down Syndrome is a genetic disorder that occurs when an individual has a full or partial extra copy of chromosome 21. There are 3 diferent types of down syndromes: trisomy, translocation, and mosaicism.

History of disorder:

In late 19th century, John Langdon down has discovered down syndrome and he has become known as " Father " of the syndrome. Instead of 46 chromosomes an individual would have 47chromosomes.

For more information click [|here] @http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome