Marberry371 Marberry371

29-07-2015
Biology

contestada

Down's syndrome is a condition where an extra chromosome is produced on the _____ chromosome.
12th
16th
21st
23rd

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WorldCitizen WorldCitizen

10-08-2015

Down;s syndrome is also known as trisomy 21 because it is caused by an additional copy of chromosome 21. The correct answer is the third one: 21st.

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