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 problem of finding 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 in flowering plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microspore and Megaspore Mother Cells**:
- Microspore mother cells (microsporocytes) are diploid cells that undergo meiosis to produce microspores, which develop into male gametes (pollen grains).
- Megaspore mother cells (megasporocytes) are also diploid cells that undergo meiosis to produce megaspores, which develop into female gametes (embryo sacs).

2. **Meiosis in Microspore Mother Cells**:
- When a microspore mother cell undergoes meiosis, it produces four haploid microspores.
- Each of these microspores can develop into a male gamete. Hence, from one microspore mother cell, we get **4 male gametes**.

3. **Meiosis in Megaspore Mother Cells**:
- Similarly, when a megaspore mother cell undergoes meiosis, it also produces four haploid megaspores.
- However, in flowering plants, typically only one of these megaspores survives and develops into a functional female gamete (embryo sac), while the other three degenerate. Thus, from one megaspore mother cell, we get **1 female gamete**.

4. **Calculating the Ratio**:
- Now, we can establish the ratio of male gametes to female gametes:
- The ratio of male gametes (from microspore mother cell) to female gametes (from megaspore mother cell) is:
\[ \text{Ratio} = \frac{\text{Number of Male Gametes}}{\text{Number of Female Gametes}} = \frac{4}{1} \]

5. **Final Answer**:
- Therefore, 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 **4:1**.