Which pair of chromosomes is concerned with Down's syndrome [MP PMT 19 – McqOptions

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1.	Which pair of chromosomes is concerned with Down's syndrome [MP PMT 1992; CBSE PMT 2002; CPMT 2002; BVP 2002; MH-CET 2002; DPMT 2003]
A.	7th
B.	18th
C.	21st
D.	23rd
Answer» D. 23rd

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