Genotype-phenotype concept was first proposed by

Options

A. Bateson
B. Johannsen
C. Sutton and Boveri
D. Punnet.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the scientist who first proposed the genotype-phenotype concept.

2. **Identifying the Options**: The options provided are:
- Option 1: Bateson
- Option 2: Johannsen
- Option 3: Sutton and Boveri
- Option 4: Punnett

3. **Analyzing Each Option**:
- **Bateson**: He coined the term "genetics" but did not specifically propose the genotype-phenotype concept.
- **Johannsen**: He is known for introducing the terms "genotype" and "phenotype" in his work, making him the correct choice.
- **Sutton and Boveri**: They contributed to the chromosomal theory of inheritance but did not focus on the genotype-phenotype distinction.
- **Punnett**: He is known for the Punnett square, which is a tool for predicting genetic outcomes, but he did not propose the genotype-phenotype concept.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 2: Johannsen**.

### Final Answer:
The genotype-phenotype concept was first proposed by **Johannsen**.

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