What is Down Syndrome?
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Down syndrome is a genetic condition caused by an extra chromosome. Typically, the human body has 23 pairs of chromosomes for a total of 46 chromosomes. Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21 for a total of 47 chromosomes.
This additional genetic material has an impact on physical characteristics and intellectual development. Common Physical Traits:
Common Intellectual Traits:
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NDSS. Retrieved July 18, 2015, from http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome/
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How is Down Syndrome Diagnosed?
Prenatal Diagnosis:
At Birth Diagnosis:
What Causes Down Syndrome?
How Common is Down Syndrome?
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References
Public Health Agency of Canada. (2013). Congenital Anomalies in Canada 2013: A Perinatal Health Surveillance Report. (Publication No. 130043). Ottawa, Ontario.
What are Common Symptoms of Down Syndrome. (2015, March 26). Retrieved July 5, 2015, from https://www.nichd.nih.gov/health/topics/down/conditioninfo/Pages/symptoms.aspx
What is Down Syndrome? (2012). Retrieved July 15, 2015, from http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome/
What are Common Symptoms of Down Syndrome. (2015, March 26). Retrieved July 5, 2015, from https://www.nichd.nih.gov/health/topics/down/conditioninfo/Pages/symptoms.aspx
What is Down Syndrome? (2012). Retrieved July 15, 2015, from http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome/