In angiosperms how many male gametes are produced by one meiosis in one pollen mother cell (PMC)

Options

A. 4
B. 8
C. 1
D. 2

Answer

To solve the question of how many male gametes are produced by one meiosis in one pollen mother cell (PMC) in angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure**:
- In angiosperms (flowering plants), the pollen mother cell (PMC) is also known as the microspore mother cell. This cell is diploid (2N).

2. **Meiosis Process**:
- The PMC undergoes meiosis, which is a type of cell division that reduces the chromosome number by half. This process results in the formation of four haploid microspores (N) from one diploid microspore mother cell (2N).

3. **Formation of Pollen Grains**:
- These four microspores develop into pollen grains. They are often referred to as a pollen tetrad because they remain attached to each other initially.

4. **Mitosis of Pollen Grains**:
- Each pollen grain undergoes mitosis. This results in the formation of two cells within each pollen grain: a vegetative cell and a generative cell.

5. **Division of Generative Cell**:
- The generative cell then undergoes another mitosis, resulting in the formation of two male gametes.

6. **Total Male Gametes**:
- Since each of the four pollen grains produces two male gametes, the total number of male gametes produced from one PMC after meiosis is:
\[ 4 \text{ pollen grains} \times 2 \text{ male gametes per pollen grain} = 8 \text{ male gametes} \]

### Conclusion:
Thus, from one meiosis in one pollen mother cell, a total of **eight male gametes** are produced.