What is not a post fertilization event

Options

A. Fruit formation
B. Gametogenesis
C. Seed formation
D. Embryogenesis

Answer

To determine what is not a post-fertilization event, we need to analyze the provided options in relation to the process of fertilization.

### Step-by-Step Solution:

1. **Understanding Post-Fertilization Events**:
- Post-fertilization events are processes that occur after the fertilization of the egg by the sperm. These include the development of the embryo, formation of seeds, and the formation of fruits.

2. **Analyzing the Options**:
- **Option 1: Fruit Formation**
- Fruit formation occurs after fertilization. Once fertilization happens, the ovary of the flower develops into a fruit. Therefore, this is a post-fertilization event.

- **Option 2: Gametogenesis**
- Gametogenesis is the process of forming gametes (sperm and egg cells). This process occurs before fertilization, as gametes must be present for fertilization to take place. Hence, this is not a post-fertilization event.

- **Option 3: Seed Formation**
- Seed formation occurs after fertilization. The fertilized ovule develops into a seed, which is a post-fertilization event.

- **Option 4: Embryogenesis**
- Embryogenesis is the process of development of the embryo from the fertilized egg. This process also occurs after fertilization, making it a post-fertilization event.

3. **Conclusion**:
- Among the options provided, gametogenesis is the only process that does not occur after fertilization. Therefore, the correct answer to the question "What is not a post-fertilization event?" is **gametogenesis**.

### Final Answer:
**Gametogenesis**