Normally how many pollen mother cells are necessary for formation of 400 seeds

Options

A. 200
B. 500
C. 100
D. 400

Answer

To determine how many pollen mother cells are necessary for the formation of 400 seeds, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Pollen Mother Cells**:
- Pollen mother cells (PMC) undergo meiosis to produce microspores. Each PMC divides meiotically to form four microspores.

2. **Calculate Microspores from One Pollen Mother Cell**:
- From one pollen mother cell, we get 4 microspores (tetrads).

3. **Determine the Number of Microspores Needed for 400 Seeds**:
- Each seed typically requires one microspore. Therefore, to form 400 seeds, we need 400 microspores.

4. **Calculate the Number of Pollen Mother Cells Required**:
- Since one pollen mother cell produces 4 microspores, we can find the number of pollen mother cells needed by dividing the total number of microspores by the number of microspores produced by one PMC.
- Number of pollen mother cells needed = Total microspores needed / Microspores per PMC
- Number of pollen mother cells needed = 400 microspores / 4 microspores per PMC = 100 pollen mother cells.

5. **Conclusion**:
- Therefore, 100 pollen mother cells are necessary for the formation of 400 seeds.

### Final Answer:
100 pollen mother cells are required for the formation of 400 seeds.

---