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Lyrx [107]
3 years ago
10

A person is born with an extra copy of chromosome 21, what type of mutation has occurred?

Biology
2 answers:
Shalnov [3]3 years ago
7 0
The answer is A, DNA mutation. :) 
Hope this helps! 
guapka [62]3 years ago
5 0
Hold on. Failure of chromosomes copying is known as non-disjunction. This mutation is known as trisomy 21, or Down’s syndrome. I believe the answer is D.
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