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  • 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 is a genetic condition caused when an unusual cell division results in an extra full or partial copy of chromosome 21 This extra genetic material causes the developmental changes and physical features of Down syndrome The term "syndrome" refers to a set of symptoms that tend to happen together
  • 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
  • Down Syndrome | Birth Defects | CDC - Centers for Disease Control and . . .
    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
  • General Information - Canadian Down Syndrome Society
    What is Down syndrome? Learn general information like the different types, how it affects people, how to talk about Down syndrome, and more!
  • Down Syndrome: Causes, Symptoms, Diagnosis, and Treatment - WebMD
    Down syndrome is a genetic condition that causes mild to significant physical and developmental problems People with Down syndrome (DS) are born with an extra chromosome
  • Down Syndrome: Causes, Types, and Symptoms - Healthline
    Down 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, trisomy 21
  • What is Down Syndrome? - The Down Syndrome Association of Toronto (DSAT)
    Down syndrome is a genetic disorder caused by the presence of an extra copy of the 21st chromosome, instead of the usual two copies This extra chromosome leads to issues that affect both the cognitive and physical ability of an individual
  • Downs Syndrome (Causes, Symptoms, and Treatment) - 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
  • Symptoms and Characteristics of Down Syndrome - Verywell Health
    Down syndrome (trisomy 21) is a genetic disorder that affects about one in 700 newborns Often, people with Down syndrome look the same or related due to distinctive physical characteristics This article explains Down syndrome and how it is diagnosed





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