What will be the ratio of the number of male gametes produced from one microspore mother cell to number of female gametes produced from the megapose mother cell in flowering plants ?

Options

A. `4:1`
B. `1:1`
C. `8:1`
D. `16:1`

Answer

To solve the question regarding the ratio of male gametes produced from one microspore mother cell to the number of female gametes produced from one megaspore mother cell in flowering plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microspore Mother Cell**:
- A microspore mother cell (also known as pollen mother cell) undergoes meiosis to produce microspores.
- Each microspore develops into a pollen grain, which is the male gametophyte.

2. **Microspore Production**:
- One microspore mother cell produces four microspores through meiosis.
- Therefore, from one microspore mother cell, we have 4 pollen grains.

3. **Male Gamete Formation**:
- Each pollen grain contains a generative cell that divides mitotically to form two male gametes.
- Thus, each pollen grain produces 2 male gametes.

4. **Total Male Gametes**:
- Since there are 4 pollen grains and each produces 2 male gametes, the total number of male gametes produced from one microspore mother cell is:
\[ \text{Total Male Gametes} = 4 \text{ pollen grains} \times 2 \text{ male gametes/pollen grain} = 8 \text{ male gametes} \]

5. **Understanding Megaspore Mother Cell**:
- A megaspore mother cell undergoes meiosis to produce four megaspores.
- Out of these four megaspores, three degenerate, and only one megaspore survives to develop into the female gametophyte.

6. **Female Gamete Formation**:
- The surviving megaspore develops into the female gametophyte, which produces one egg cell (female gamete).

7. **Total Female Gametes**:
- Therefore, from one megaspore mother cell, the total number of female gametes produced is:
\[ \text{Total Female Gametes} = 1 \]

8. **Calculating the Ratio**:
- Now, we can find the ratio of male gametes to female gametes:
\[ \text{Ratio} = \frac{\text{Number of Male Gametes}}{\text{Number of Female Gametes}} = \frac{8}{1} = 8:1 \]

### Conclusion:
The ratio of the number of male gametes produced from one microspore mother cell to the number of female gametes produced from one megaspore mother cell is **8:1**.