Fusion of two dissimilar gametes is known as :

Options

A. Allogammy
B. Autogamy
C. Anisogamy
D. Paedogenesis

Answer

To answer the question "Fusion of two dissimilar gametes is known as:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gametes**:
- Gametes are the reproductive cells involved in sexual reproduction. In most organisms, there are two types of gametes: male (sperm) and female (egg).

2. **Identifying the Types of Fertilization**:
- Fertilization can occur in various forms, and the question specifically asks about the fusion of dissimilar gametes.

3. **Analyzing the Options**:
- **Allogamy**: This is the fusion of gametes from different individuals or plants, often referred to as cross-pollination. However, it does not specifically refer to the dissimilarity of gametes.
- **Autogamy**: This refers to the fusion of gametes from the same individual. Thus, it does not involve dissimilar gametes.
- **Anisogamy**: This term describes the fusion of two gametes that are dissimilar in size and form. This is the correct term for the fusion of dissimilar gametes.
- **Pedogenesis**: This refers to reproduction involving larval organisms and is not related to the fusion of gametes.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Anisogamy**, as it specifically refers to the fusion of dissimilar gametes.

### Final Answer:
The fusion of two dissimilar gametes is known as **Anisogamy**.