In how many cells the meiotic division has taken place if the total number of pollen grains is 32?

Options

A. 16
B. 8
C. 4
D. 5

Answer

To determine how many cells underwent meiotic division to produce a total of 32 pollen grains, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Meiosis**:
- Meiosis is a type of cell division that results in four daughter cells from one parent cell. Each of these daughter cells is haploid (contains half the number of chromosomes).

2. **Identify the Relationship Between Parent Cells and Pollen Grains**:
- Since one meiotic division produces four pollen grains (gametes), we can establish a relationship:
- 1 parent cell → 4 pollen grains.

3. **Set Up the Calculation**:
- We need to find out how many parent cells are needed to produce 32 pollen grains.
- Using the unitary method, we can set up the equation:
- If 1 parent cell produces 4 pollen grains, then to find the number of parent cells (let's call it X) needed to produce 32 pollen grains, we can use the formula:
\[ X = \frac{32 \text{ pollen grains}}{4 \text{ pollen grains per cell}} \]

4. **Perform the Calculation**:
- Calculate the number of parent cells:
\[ X = \frac{32}{4} = 8 \]

5. **Conclusion**:
- Therefore, 8 cells underwent meiotic division to produce a total of 32 pollen grains.

### Final Answer:
The number of cells in which meiotic division has taken place is **8**.

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