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Normally when cells divide, the pair of chromosomes are split evenly between the two resulting cells. Nondisjunction is the failure of the pair of chromosomes to separate during the cell division causing the produced cells to have an abnormal number of chromosomes i.e. one daughter cell has two chromosomes and the other has none. This abnormality can result in conditions such as Down's syndrome, Edward's syndrome and Hession syndrome. ...more »
Read more about causes of Nondisjunction.
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Nondisjunction is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Nondisjunction, or a subtype of Nondisjunction,
affects less than 200,000 people in the US population.
Source - National Institutes of Health (NIH)
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