Question

A mother plant having 16 chromosomes produced ovules and underwent megasporogenesis, then the ploidy of the nucleus of A, B, C, D is: 

 

• A. A:16, B:16, C:8, D:16
• B. A:16, B:16, C:8, D:8
• C. A:16, B:32, C:8, D:8
• D. A:16, B:8, C:16, D:8

Hint:

In megasporogenesis, the mother cell is diploid, and after meiosis, the resulting megaspores are haploid.

Answer 1

The Correct Option is D

In megasporogenesis, the mother plant produces ovules, and each ovule undergoes meiosis. Meiosis reduces the chromosome number by half, leading to haploid gametes.
The nucleus of A and C will have the same ploidy as the mother plant (16 chromosomes).
Nucleus B will undergo meiosis, resulting in a haploid number (8 chromosomes).
Nucleus D, as a result of the second meiotic division, also has 8 chromosomes.