Term 'Pure line' was coined by
(a) Mendel
(b) Johannsen
(c) Bateson
(d) T.H. Morgan

Options

A. Mendel
B. Johannsen
C. Bateson
D. T.H. Morgan

Answer

To solve the question regarding who coined the term "Pure line," we can follow these steps:

### Step 1: Understand the term "Pure line"
The term "Pure line" is commonly used in genetics to refer to a genetically uniform line of organisms. It is important to know who first introduced this term in the field of genetics.

**Hint:** Research the historical context of genetics and the contributions of various scientists.

### Step 2: Analyze the options given
The options provided are:
(a) Mendel
(b) Johannsen
(c) Bateson
(d) T.H. Morgan

We need to evaluate each scientist's contribution to genetics to determine who coined the term.

**Hint:** Consider what each scientist is known for in the field of genetics.

### Step 3: Evaluate each option
- **Mendel**: Known for his experiments with pea plants and the laws of inheritance. He did not coin the term "Pure line."

- **Johannsen**: A Danish botanist who coined the term "Pure line" around 1903. He also introduced the concepts of genotype and phenotype.

- **Bateson**: Known for his work in genetics and for coining the term "genetics," but he did not coin "Pure line."

- **T.H. Morgan**: Conducted experiments on fruit flies (Drosophila melanogaster) and contributed to the understanding of genetic linkage, but he did not coin "Pure line."

**Hint:** Identify which of these scientists is associated with the term "Pure line" specifically.

### Step 4: Conclusion
Based on the evaluation, the correct answer is (b) Johannsen, as he is credited with coining the term "Pure line."

**Final Answer:** (b) Johannsen