Down's Syndrome

People with this genetic disorder have 47 chromosomes instead of the 46 that would be the usual. Down syndrome is a genetic disorder that is caused by the additional presence of chromosome 21, which causes problems in the development of body and brain. People with Down syndrome have a common appearance characterized by a smaller-than-normal head, mouth and small ears, short and broad hands with short fingers, etc. Also, patients with the disorder suffers from social and mental retardation lower, for example, a slow learning process, impulsive and childlike behavior, and attention span and slow concentration.