How many meiotic divisions are required for the formation of 100 pollen grains ?

Options

A. 100
B. 50
C. 25
D. 26

Explanation

To determine how many meiotic divisions are required for the formation of 100 pollen grains, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microsporogenesis**:
- Microsporogenesis is the process through which pollen grains (microspores) are formed from pollen mother cells (microspore mother cells). Each pollen mother cell undergoes meiosis to produce four microspores.

2. **Meiotic Division**:
- Each pollen mother cell undergoes one meiotic division, which results in the formation of four microspores (pollen grains).

3. **Calculating the Number of Pollen Mother Cells Needed**:
- Since one pollen mother cell produces four microspores, to find out how many pollen mother cells are needed to produce 100 pollen grains, we can set up the equation:
\[ \text{Number of pollen mother cells} = \frac{\text{Total pollen grains}}{\text{Pollen grains per mother cell}} = \frac{100}{4} = 25 \]

4. **Determining the Number of Meiotic Divisions**:
- As established, each pollen mother cell undergoes one meiotic division. Therefore, if we have 25 pollen mother cells, the total number of meiotic divisions required will be equal to the number of pollen mother cells:
\[ \text{Total meiotic divisions} = 25 \]

5. **Final Answer**:
- Thus, the number of meiotic divisions required for the formation of 100 pollen grains is **25**.

### Summary:
- **Total meiotic divisions required**: 25