Down’s syndrome is caused by (MHT-CET)

Down’s syndrome is caused by (MHT-CET)

Q. Down’s syndrome is caused by (MHT-CET)

A.            Monosomy of 21 chromosome

B.            Trisomy of 21st chromosome

C.            Deletion in chromosome

D.            Duplication of chromosome       

Answer: Trisomy of 21st chromosome

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