Question

How many meiotic and mitotic divisions occur during the development of male gametophyte from the mother cell?

विकल्प

• One meiotic and two mitotic

• Two meiotic only

• Two mitotic only

• One mitotic and one meiotic

Answer 1

One meiotic and two mitotic

Explanation:

During microsporogenesis, microsporocytes undergo:

1. One meiotic division: To produce a tetrad of four haploid microspores. The released microspores undergo a highly asymmetric division.
2. 1^st Mitosis: To produce a bicellular pollen grain with a small germ cell engulfed within the cytoplasm of a large vegetative cell. The germ cell undergoes a further mitotic division.
3. 2^nd Mitosis: To produce twin sperm cells.

So the correct answer is one meiotic and two mitotic divisions.