Which type of chromosomal mutation causes this form of Down syndrome?

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asked Nov 16, 2017 64.7k views

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Suraj Kothari · Answer 1 · 2017-11-23T02:01:44+0000

Nondisjunction

It is in an embryo with three copies of chromosome 21 instead of the usual two. So if the pairs of 21st chromosomes in either the sperm or the egg then it fails to separate to form an egg.

Which type of chromosomal mutation causes this form of Down syndrome?

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