Down syndrome is also called _____.
A) trisomy-12
B) trisomy-13
C) trisomy-21
D) trisomy-31

Name: Down syndrome is also called _____. A) trisomy-12 B) trisomy-13 C) trisomy-21 D) trisomy-31
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Down syndrome is caused by an extra copy of chromosome 21, also known as trisomy-21. Trisomy-12 and trisomy-13 refer to extra copies of chromosomes 12 and 13, respectively, and trisomy-31 is not a recognized condition.

Down Syndrome Is Also Called _____