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11 October, 14:26

Individuals with Down syndrome have an extra chromosome 21. This is an example of which type of chromosome disorder?

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  1. 11 October, 17:27
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    This is a type of genetic variation or chromosome disorder called Trisomy 21. This is the most common cause of Down Syndrome. Instead of having two copies of chromosome 21, the offspring has an extra copy. This can be due to abnormal cell division during the sperm/egg cell development.
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