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

12th
16th
21st
23rd

User Vroomfundel
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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.
User Mdthh
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