Question

The conclusion from the statement that brain cells of housefly Musca domestica contains 6 pairs of chromosomes is:

• A. The fly's diploid number is 24.
• B. The fly's haploid number is 12.
• C. The fly's haploid number is 3.
• D. The fly's haploid number is 6.
• E. The fly's haploid number is 24.

Answer 1

The correct option is D The fly's haploid number is 6.

The number of chromosomes in the body cells and the brain cells are same in the organism. In Musca domestica, there are 6 pairs of chromosomes in the brain which means there are total 12 chromosomes. Here, the diploid number is 2n = 12 and the haploid number is n = 6.

Thus, the correct answer is option 'The fly's haploid number is 6'.