Number of spindle apparatus formed during the formation of one hundred microspores from microspore mother cells is

Options

A. 25
B. 75
C. 50
D. 100

Answer

To determine the number of spindle apparatus formed during the formation of 100 microspores from microspore mother cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Microspore Formation:**
Microspores are formed from microspore mother cells through a process called meiosis. Each microspore mother cell undergoes meiosis to produce four haploid microspores.

2. **Calculate the Number of Microspore Mother Cells Required:**
Since one microspore mother cell produces four microspores, to find out how many microspore mother cells are needed to produce 100 microspores, we can use the formula:
\[ \text{Number of microspore mother cells} = \frac{\text{Total microspores}}{4} \]
Thus,
\[ \text{Number of microspore mother cells} = \frac{100}{4} = 25 \]

3. **Determine the Number of Meiotic Divisions:**
Each microspore mother cell undergoes one meiotic division to produce four microspores. Therefore, to produce 25 microspore mother cells, we need 25 meiotic divisions.

4. **Relate Meiotic Divisions to Spindle Apparatus Formation:**
During each meiotic division, a spindle apparatus is formed. Therefore, the number of spindle apparatus formed will be equal to the number of meiotic divisions.

5. **Final Calculation:**
Since we have established that 25 meiotic divisions are required to produce 100 microspores, it follows that:
\[ \text{Number of spindle apparatus} = 25 \]

### Conclusion:
The number of spindle apparatus formed during the formation of 100 microspores from microspore mother cells is **25**.

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