Down syndrome - Wikipedia Down syndrome or Down's syndrome, [12] also known as Trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21 [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features [1][13]
Down syndrome - Symptoms and causes - Mayo Clinic Down syndrome varies in severity among individuals The condition causes lifelong intellectual disability and developmental delays It's the most common genetic chromosomal cause of intellectual disabilities in children It also commonly causes other medical conditions, including heart and digestive system problems
Down Syndrome | Birth Defects | CDC Down syndrome is a genetic condition where a person is born with an extra chromosome This can affect how their brain and body develop People diagnosed with Down syndrome can lead healthy lives with supportive care
Facts, Myths, Truths About Down Syndrome - 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 Institute Down syndrome can be diagnosed in infancy based on the characteristic clinical findings When Down syndrome is suspected in a person, a genetic test called a chromosome analysis is performed on a blood or skin sample to look for an extra chromosome 21 (trisomy 21)
About Downs Syndrome - Downs Syndrome Association Down’s syndrome is when you’re born with an extra chromosome You usually get an extra chromosome by chance, because of a change in the sperm or egg before you’re born People who have Down’s syndrome will have some level of learning disability This means they’ll have a range of abilities
Downs Syndrome: Symptoms, Medical Conditions, Support - Patient Down's syndrome (also known as Down syndrome) is a genetic chromosome problem Someone with Down's syndrome has an extra copy of chromosome 21 in the cells of their body This causes the typical features of the condition All people with Down's syndrome have some degree of learning disability
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