Question

An abnormal megaspore mother cell (MMC) has double the number of chromosomes. What will be the number of nuclei in the typical embryo sac formed from the megaspore of such a megaspore mother cell?

• A. 8
• B. 16
• C. 12
• D. 4

Answer 1

The correct option is A 8

The number of nuclei in the embryo sac will be 8. However, each of those nuclei will have double the number of chromosomes that a haploid nuclei in embryo sac normally has. Hence, the nuclei of the embryo sac, formed from a MMC with double the number of chromosomes than usual, will have the same number of chromosomes as a normal megaspore mother cell or a normal somatic plant cell. The number of chromosomes will have no effect on the number of nuclei.