Ques. 1AIPMT 2001
In grasses what happens in microspore mother cell for the formation of mature pollen grains?
- One meiotic and two mitotic divisions
- One meiotic and one mitotic divisions
- One meiotic division
- One mitotic division
Answer
(2) One meiotic and one mitotic divisions
Solution
As per NCERT, each microspore mother cell (pollen mother cell) undergoes meiosis to form a tetrad of haploid microspores.
⇒ Each microspore matures into a pollen grain; its nucleus divides mitotically to form the vegetative cell and the generative cell.
∴ One meiotic and one mitotic division form a mature pollen grain.
Answer: (2)