Question

Size of m-chromosomes of some insects and bryophytes is?

• A. $200-400\mu m$
• B. Less than $0.5\mu m$
• C. $1-10\mu m$
• D. Variable

Answer 1

The correct option is D Variable

Answer is option D i.e. "Variable"
The m-chromosome is the smallest chromosome in the normal chromosome complement. The term m-chromosome has been used for accessory chromosomes. The accessory chromosomes are much shorter than the smallest chromosome in the normal chromosome set and arise from hetero-chromatic chromosomes, hence their size is variable.