21-08-2019
Biology

contestada

An extra copy of chromosome 21 in humans causes
Down syndrome
cystic fibrosis
HIV
none of the above

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connorkerstingowu1no connorkerstingowu1no

21-08-2019

Answer:

Down syndrome is when there is an extra copy of chromosome 21

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idonthaveaname18 idonthaveaname18

21-08-2019

Down syndrome is the result of an extra copy of chromosome 21 in a human.

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