Down's Syndrome

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Down's Syndrome is a genetic disorder caused by trisomy in chromosome 21, which is in turn a result of post-miotic nondisjunction occuring. Trisomy 21 is a rare conditon, occuring in one in six hundred children. However, this is more likely to decrease once a mother is over forty. A physical charcteristic of a person with this disease is mental retardation, a flattened nose, a long toungue, a flat back of the head, broad hands with short fingers[1] and small feet. These children also tend to have a shorter life span[2].


  1. NHS Down's Syndrome Characteristics. Reviewed: 30/04/2017 [cited:05/12/2017]. Available at:
  2. Kevin T.Patton, Gary A.Thibodeau (2010) Anatomy & Physiology, 19th edition, US: Mosby, Inc.., an affiliate of Elsevier Inc. Chapter 6, page 1120.

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