JKSSB Mock Tests

The genetic condition 'Down Syndrome' is characterized by the presence of an extra copy of which chromosome

A. Chromosome 18
B. Chromosome 21
C. Chromosome 13
D. X Chromosome
Answer: Option B
Solution (By JKSSB Mock Tests Team)
Down syndrome is also called Trisomy 21, where there are three copies of chromosome 21 instead of two.
This Question Belongs to: General science Biology set 1
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