Down+Syndrome-Symptoms

- A common birth defect that is usually due to an extra chromosome 21. - It happens more often in mothers 35 and over. - It causes mental retardation - A characteristic facial appearance/other malformations - That person also has major risk of heart problems - Lesser risk of Partially Developed Intestines or "Duodenal Atresia" - And a signifincant risk of Leukemia