Question

Human chromosomes have been grouped on the basis of size and centromere into ____ types

• A. $5$
• B. $6$
• C. $7$
• D. $10$

Answer 1

Answer: (C)

$7$

We group chromosomes into 7 groups, based on their size (how long they are), and the position of their centromeres (the narrow part that separates the two arms from one another). Some chromosomes have their centromeres at or near the middle, some have them somewhere between the middle and the end, and some have centrosomes at the very end of the chromosomes.

So, the correct answer is '7'.