Which type of mutation causes Down syndrome?

1 Answer
Dave
May 16, 2018

I'm not an expert on this, but I don't think it is considered a mutation. It is caused by an extra chromosome (non-mutated chromosome).

Explanation:

Down Syndrome is caused by a condition called trisomy 21, or 3 copies of chromosome 21. I don't think this arises from a mutation, but rather a problematic step in meiosis.

This answer might not be complete, but gives a place to start looking from.

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