Geitonogamy is functionally__________& genetically__________.

Options

A. Autogamy, allogamy
B. Allogamy, autogamy
C. Allogamy, xenogamy
D. Autogamy, autogamy

Answer

To solve the question regarding geitonogamy, we need to analyze its functional and genetic characteristics step by step.

### Step-by-Step Solution:

1. **Understanding Geitonogamy**:
- Geitonogamy is a type of pollination where pollen is transferred from one flower to another flower on the same plant. This means that the pollination occurs between different flowers but within the same individual plant.

2. **Functional Aspect**:
- Functionally, geitonogamy is similar to allogamy (cross-pollination). In allogamy, fertilization occurs between different flowers, which can be from different plants. However, in geitonogamy, since the flowers are on the same plant, it is still considered a form of cross-pollination. Therefore, functionally, geitonogamy is considered **cross-pollination**.

3. **Genetic Aspect**:
- Genetically, geitonogamy is akin to autogamy (self-pollination). Since the pollen comes from the same plant, the genetic material is essentially the same, leading to little genetic variation. Thus, genetically, geitonogamy is considered **self-pollination**.

4. **Final Answer**:
- Therefore, we can conclude that geitonogamy is functionally **cross-pollination** (or allogamy) and genetically **self-pollination** (or autogamy).

### Summary:
- Geitonogamy is functionally **cross-pollination** and genetically **self-pollination**.