Despite high level of heterozygosity, the progeny derived from a seed of cross pollinated plant was found to be completely uniform. One reason can be

Options

A. Induced mutation
B. Polyploidy
C. Apomixis
D. Parthenocarpy.

Answer

To solve the question regarding why the progeny derived from a seed of a cross-pollinated plant was found to be completely uniform despite high levels of heterozygosity, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cross-Pollination**:
- Cross-pollination typically leads to genetic variation in the progeny because it involves the fusion of gametes from different parent plants, resulting in offspring that may exhibit a range of traits.

**Hint**: Consider what cross-pollination usually results in regarding genetic diversity.

2. **Identifying the Anomaly**:
- In this case, the progeny is described as completely uniform, which is unusual for cross-pollinated plants. This suggests that despite the genetic potential for variation, the progeny does not exhibit any.

**Hint**: Think about what could cause uniformity in progeny despite genetic diversity.

3. **Exploring Possible Explanations**:
- Several reproductive processes could explain this uniformity:
- **Apomixis**: A form of asexual reproduction where seeds are produced without fertilization, leading to progeny that are genetically identical to the parent.
- **Induced Mutation**: This would typically introduce variation, not uniformity.
- **Polyploidy**: This condition may lead to variations due to extra chromosome sets.
- **Parthenocarpy**: This refers to fruit development without fertilization, which does not directly relate to seed uniformity.

**Hint**: Focus on the reproductive processes that can lead to seed formation without the fusion of gametes.

4. **Conclusion**:
- The only process that can lead to completely uniform progeny from a cross-pollinated plant is **apomixis**. In apomixis, seeds develop from the ovule without fertilization, resulting in offspring that are clones of the parent plant.

**Hint**: Recall the definition and characteristics of apomixis and how it differs from other reproductive methods.

### Final Answer:
The correct reason for the complete uniformity of the progeny derived from a seed of a cross-pollinated plant is **apomixis**.