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Bookmark or Share- Down Syndrome: Symptoms & Causes - Cleveland ClinicDown syndrome is a genetic condition where a person is born with an extra copy of chromosome 21. This means that they have a total of 47 chromosomes instead of 46. This can affect how their brain and body develop. People diagnosed with Down syndrome have happy and healthy lives with supportive care.
- About Down Syndrome | National Down Syndrome Society (NDSS)Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21. This additional genetic material alters the course of development and causes the characteristics associated with Down syndrome.
- About Down Syndrome - National Human Genome Research InstituteDown syndrome is a chromosomal condition related to chromosome 21. It affects 1 in 800 to 1 in 1000 live born infants. What are the symptoms of Down syndrome? People who have Down syndrome have learning difficulties, mental disability, a characteristic facial appearance, and poor muscle tone (hypotonia) in infancy.
- Down Syndrome: Causes, Types, and Symptoms - HealthlineDown syndrome (sometimes called Down’s syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome — hence its other name,...
- Facts about Down Syndrome | CDCLast Reviewed: October 10, 2023. Source: National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention. Down syndrome is a condition in which a person has an extra chromosome. Learn more facts about Down Syndrome.
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