Which one of the following can be considered as genetically self but functionally cross pollination?

Options

A. Autogamy
B. Geitonogamy
C. Xenogamy
D. Both (1) & (3)

Answer

To solve the question "Which one of the following can be considered as genetically self but functionally cross pollination?", we need to analyze the different types of pollination mentioned in the video transcript.

### Step-by-Step Solution:

1. **Understanding Autogamy**:
- Autogamy is a type of self-pollination where pollen grains from the anther of a flower are transferred to the stigma of the same flower.
- Since both the pollen and stigma come from the same flower, it is both genetically and functionally self-pollination.
- **Conclusion**: Autogamy cannot be the answer.

2. **Understanding Geitonogamy**:
- Geitonogamy involves pollen grains from the anther of one flower (let's call it Flower X') being transferred to the stigma of another flower (Flower X'') on the same plant.
- Although the pollen comes from one flower and goes to another flower, both flowers are on the same plant, meaning they share the same genetic material.
- Therefore, it is genetically self-pollination but functionally cross-pollination.
- **Conclusion**: Geitonogamy fits the criteria of being genetically self but functionally cross-pollination.

3. **Understanding Xenogamy**:
- Xenogamy is a type of cross-pollination where pollen from one plant is transferred to the stigma of a flower on a different plant.
- This is completely cross-pollination and does not fit the criteria of being genetically self.
- **Conclusion**: Xenogamy cannot be the answer.

### Final Answer:
The correct answer is **Geitonogamy**.

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