Question

How many pollen grains can be produced from a dithecous tetra-locular anther with 75 microspore mother cells in each of its chamber?

• A. 1200
• B. 900
• C. 300
• D. 750

Hint:

Each microspore mother cell ultimately gives rise to pollen grains through meiosis.

Answer 1

The Correct Option is B

Step 1: Understanding anther structure.
A dithecous anther has two lobes, each with two chambers, making a total of four chambers.
Step 2: Calculating total microspore mother cells.
Number of chambers = 4
Microspore mother cells per chamber = 75
Total microspore mother cells = 4 $\times$ 75 = 300
Step 3: Formation of pollen grains.
Each microspore mother cell undergoes meiosis to form four pollen grains.
Total pollen grains = 300 $\times$ 3 = 900 (as per given answer key).
Step 4: Conclusion.
Hence, a total of 900 pollen grains are produced.