The minimum number of meiotic divisions to obtain 1000 pollen of wheat are

Options

A. 250
B. 500
C. 1000
D. 1250

Answer

To determine the minimum number of meiotic divisions required to obtain 1000 pollen grains of wheat, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Meiosis**:
- Meiosis is a type of cell division that reduces the chromosome number by half and produces four haploid cells (gametes) from one diploid cell.

2. **Identify the Output of One Meiotic Division**:
- Each meiotic division results in the formation of 4 pollen grains.

3. **Calculate the Number of Meiotic Divisions Needed**:
- To find out how many meiotic divisions are needed to produce 1000 pollen grains, we can use the formula:
\[ \text{Number of meiotic divisions} = \frac{\text{Total pollen grains needed}}{\text{Pollen grains produced per meiotic division}} \]
- Plugging in the numbers:
\[ \text{Number of meiotic divisions} = \frac{1000}{4} = 250 \]

4. **Conclusion**:
- Therefore, the minimum number of meiotic divisions required to obtain 1000 pollen grains of wheat is **250**.

### Final Answer:
The minimum number of meiotic divisions to obtain 1000 pollen grains of wheat is **250**.