Who coined the term 'haterozygous'?

Options

A. Bateson
B. Saunders
C. Jahannsen
D. All except (3)

Answer

To answer the question "Who coined the term 'heterozygous'?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term 'Heterozygous':**
- The term 'heterozygous' refers to an organism that has two different alleles for a particular gene. For example, if one allele is dominant (A) and the other is recessive (a), the organism is considered heterozygous (Aa).

2. **Identify the Scientist Associated with the Term:**
- The question asks for the scientist who coined the term. According to the information provided, the term 'heterozygous' was introduced in the context of genetics.

3. **Recall the Historical Context:**
- The term was coined in the early 20th century, specifically in 1902. This is an important detail that helps narrow down the possible scientists.

4. **Determine the Correct Scientist:**
- The video transcript mentions that the scientist who coined the term 'heterozygous' is Bateson. Other scientists mentioned, such as Sounders and Johansen, contributed to different areas of genetics but did not coin this specific term.

5. **Conclusion:**
- Therefore, the correct answer to the question is that the term 'heterozygous' was coined by Bateson in 1902.

### Final Answer:
The term 'heterozygous' was coined by Bateson in 1902.

---