Which contributed to the success of Mendel ?
A. Selection of pea plant
B. His knowledge of biology
C. Consideration of one character at one time
D. He had knowledge of linkage

Options

A. A,C,D
B. A,B,C,D
C. A,C
D. A,B,C

Answer

To determine which factors contributed to the success of Gregor Mendel in his experiments on inheritance, we can analyze each option provided in the question.

### Step-by-Step Solution:

1. **Selection of Pea Plant (Option A)**:
- Mendel chose the pea plant (Pisum sativum) for his experiments due to its several advantageous traits. Pea plants have distinct characteristics that are easy to observe, such as flower color, seed shape, and pod color. This selection allowed Mendel to conduct controlled experiments and obtain clear results.
- **Conclusion**: This option is correct.

2. **His Knowledge of Biology (Option B)**:
- It is important to note that Mendel was not formally trained in biology; he was a philosophy student. His success was largely due to his application of statistical and probabilistic methods rather than a deep understanding of biological concepts.
- **Conclusion**: This option is incorrect.

3. **Consideration of One Character at One Time (Option C)**:
- Mendel focused on one trait at a time during his experiments, which simplified the analysis of inheritance patterns. By isolating single traits, he was able to establish clear ratios in the offspring, leading to his formulation of the laws of inheritance.
- **Conclusion**: This option is correct.

4. **He Had Knowledge of Linkage (Option D)**:
- Mendel did not have knowledge of genetic linkage. His experiments were based on the assumption of independent assortment of traits, which is only true for genes located on different chromosomes or far apart on the same chromosome. Linkage was not a concept he addressed in his work.
- **Conclusion**: This option is incorrect.

### Final Answer:
The factors that contributed to Mendel's success are:
- **A. Selection of pea plant** (Correct)
- **C. Consideration of one character at one time** (Correct)