Fusion of dissimilar gametes is

Options

A. Allogamy
B. Dichogamy
C. Autogamy
D. Fertilization

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the fusion of dissimilar gametes. We need to identify the correct term that describes this process.

2. **Analyzing the Options**:
- **Option 1: Allogamy**: This term refers to the fertilization of the ovum of a flower by the pollen from another flower on a different plant. While it involves gametes from different plants, the gametes themselves are not dissimilar; they are still of the same type (male and female gametes of the same species). Thus, this option is incorrect.

- **Option 2: Dicogamy**: This condition occurs when the stamens and pistil of a flower mature at different times to prevent self-pollination. This option does not refer to the fusion of dissimilar gametes, so it is also incorrect.

- **Option 3: Autogamy**: This is the fusion of gametes produced from the same individual, meaning the gametes are similar in structure. Therefore, this option is also incorrect.

- **Option 4: Fertilization**: This term refers specifically to the process of fusion of dissimilar gametes, which occurs during sexual reproduction. This option correctly describes the fusion of gametes from different individuals, making it the correct answer.

3. **Conclusion**: The correct answer to the question "Fusion of dissimilar gametes is" is **Fertilization**.

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