Question

In how many groups are the 23 human chromosome pairs divided?

• A. Nine
• B. Seven
• C. Five
• D. Eleven

Answer 1

The correct option is B Seven

We group chromosomes based on their size, the position of their centromeres, and their banding pattern when stained. we group all of these 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 'Seven'.