How many meiotic divisions are essential in formation of 100 seeds in Cyperaceae family :-

Options

A. 400
B. 125
C. 200
D. 25

Answer

To determine how many meiotic divisions are essential in the formation of 100 seeds in the Cyperaceae family, we can break down the process as follows:

### Step-by-Step Solution:

1. **Understanding Seed Formation**:
- Seeds are formed when male gametes (pollen) fuse with female gametes (ovules). Therefore, to form 100 seeds, we need 100 male gametes and 100 female gametes.

2. **Meiotic Division for Male Gametes**:
- Male gametes are produced from microspore mother cells (microsporocytes) through meiosis.
- Each microspore mother cell undergoes one meiotic division to produce four microspores, but only one of these typically develops into a functional male gamete.
- To obtain 100 functional male gametes, we need 100 meiotic divisions since each meiotic division yields one functional microspore.

3. **Meiotic Division for Female Gametes**:
- Similarly, female gametes are produced from megaspore mother cells (megasporocytes) through meiosis.
- Each megaspore mother cell also undergoes one meiotic division to produce four megaspores, with typically one developing into a functional female gamete.
- Thus, to obtain 100 functional female gametes, we also need 100 meiotic divisions.

4. **Total Meiotic Divisions**:
- Since we need 100 meiotic divisions for male gametes and 100 meiotic divisions for female gametes, the total number of meiotic divisions required is:
\[ 100 \text{ (for male gametes)} + 100 \text{ (for female gametes)} = 200 \text{ meiotic divisions} \]

5. **Final Answer**:
- Therefore, the total number of meiotic divisions essential for the formation of 100 seeds in the Cyperaceae family is **200**.