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Alternate Name(s): Trisomy 21 ... In most cases, Down syndrome is caused by an extra chromosome 21. It is the most common single cause of human birth defects, with an occurrence in 1 out of every 660 births. Children with Down syndrome have a widely recognized characteristic ...
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Down syndrome is a chromosomal disorder. Instead of having 46 chromosomes, 23 from each parent, a child with Down syndrome ends up with 47 chromosomes. This leads to delays in development and other health problems. The life expectancy for… More »
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News results for Causes of down Syndrome
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Down syndrome is a condition in which extra genetic material causes delays in the way a child develops, and often leads to mental retardation. ... What Causes Down Syndrome?
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What's up with Down syndrome? ... Most people have 23 pairs of chromosomes, for a total of 46. But a baby with Down syndrome has an extra chromosome (47 instead of 46) or one chromosome has an extra part. This extra genetic material causes problems with the way their bodies develop.
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Down syndrome — Comprehensive overview covers causes, risk factors and diagnosis of this genetic disorder. ... The cause of Down syndrome is one of three types of abnormal cell division involving chromosome 21. All three abnormalities result in extra genetic material from chromosome 21, which is responsible for...
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