Mendel failed to produce same result in

Options

A. Hieracium (Hawk weed)
B. Mango
C. Drosophila
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Mendel's Work**: Gregor Mendel is recognized as the father of genetics due to his foundational experiments with pea plants (Pisum sativum). He studied the inheritance patterns of seven different traits.

2. **Identifying the Question**: The question asks about the organism in which Mendel failed to produce the same results as he did with pea plants. The options provided are Rhesium, Hawkweed, Mango, Drosophila, or none of the above.

3. **Examining the Options**:
- **Rhesium**: Not commonly associated with Mendel's work.
- **Hawkweed**: Mendel attempted experiments with this plant but encountered issues.
- **Mango**: Not a subject of Mendel's experiments.
- **Drosophila**: Commonly used in genetics but not by Mendel himself.

4. **Focusing on Hawkweed**: Mendel's experiments with Hawkweed were unsuccessful because this plant reproduces through parthenogenesis, a form of asexual reproduction where fertilization does not occur. This means that the expected Mendelian ratios could not be observed.

5. **Conclusion**: Therefore, the correct answer to the question is **Hawkweed**, as Mendel failed to produce the same results in this organism due to its unique reproductive method.