• Down Syndrome

      kidshealth.org/parent/medical/genetic/down_syndrome.html Down syndrome is a condition in which extra genetic material causes delays in the way a child develops, both physically and mentally.
    • Down syndrome - Wikipedia, the free encyclopedia

      en.wikipedia.org/wiki/Down_syndrome Down syndrome (DS or DNS) or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [1]
    • Down syndrome - Genetics Home Reference

      ghr.nlm.nih.gov/condition/down-syndrome Down syndrome is a chromosomal condition that is associated with intellectual disability, a characteristic facial appearance, and weak muscle tone ...
    • What Is Down Syndrome? -- Types and Causes - WebMD

      www.webmd.com/children/guide/understanding-down-syndrome-basics What Is Down Syndrome? Down syndrome is one of the most common genetic birth defects. Usually, children born with the condition have some degree of mental retardation
    • Down Syndrome: Get the Facts on Symptoms - MedicineNet

      www.medicinenet.com/down_syndrome_overview/article.htm Down Syndrome Causes and Symptoms. Down syndrome is a genetic disorder in which, most often, a third copy of chromosome 21 is present in cells because of an abnormal ...
    • Down Syndrome-Topic Overview - WebMD

      www.webmd.com/children/tc/down-syndrome-topic-overview Down syndrome is a lifelong condition in which a person is born with distinct physical features and some degree of cognitive disability.
    • What causes Down syndrome?

      www.nichd.nih.gov/health/topics/down/conditioninfo/pages/causes.aspx What causes Down syndrome? Skip sharing on social media links. Share this: Down syndrome is caused by a random error in cell division that results in the presence of ...