How many post-meiotic meiotic division will be required to produce 100 zygotes in a flowering plants ?

Options

A. 100
B. 125
C. 500
D. 250

Answer

To solve the problem of how many post-meiotic divisions are required to produce 100 zygotes in flowering plants, we can break it down into several steps:

### Step 1: Understand the Process of Zygote Formation
In flowering plants (angiosperms), zygotes are formed from the fusion of male and female gametes. The male gametes are produced from microspores, and the female gametes are produced from megaspores.

### Step 2: Determine Meiotic Divisions for Gamete Formation
- **Microspores** (which develop into male gametes) are produced from **4 meiotic divisions**.
- **Megaspores** (which develop into female gametes) are produced from **1 meiotic division**.

### Step 3: Calculate Total Meiotic Divisions for One Zygote
To form one zygote, we need:
- 4 meiotic divisions for the male gamete (microspore)
- 1 meiotic division for the female gamete (megaspore)

Thus, the total meiotic divisions required for one zygote is:
\[ 4 \text{ (for male)} + 1 \text{ (for female)} = 5 \text{ meiotic divisions} \]

### Step 4: Calculate Total Meiotic Divisions for 100 Zygotes
To find out how many meiotic divisions are needed to produce 100 zygotes, we multiply the number of meiotic divisions needed for one zygote by the number of zygotes:
\[ 5 \text{ meiotic divisions/zygot} \times 100 \text{ zygotes} = 500 \text{ meiotic divisions} \]

### Conclusion
Therefore, to produce 100 zygotes in flowering plants, a total of **500 meiotic divisions** are required.