Who noted that the behaviour of chromosomes was parallel to the behaviour of genes and uses chromosomes movement to explain Mendel's law ?

Options

A. T.H. Morgan
B. Hugo de Vries
C. Sutton and Boveri
D. Beadle and Tatum

Answer

To solve the question of who noted that the behavior of chromosomes was parallel to the behavior of genes and used chromosome movement to explain Mendel's law, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a scientist or scientists who observed a parallel between chromosome behavior and gene behavior, specifically in relation to Mendel's laws of inheritance.

2. **Evaluate the Options**:
- **Option 1: T.H. Morgan**: He contributed to genetics by demonstrating that genes are linked in a series on chromosomes. However, he did not specifically relate chromosome movement to Mendel's laws. Therefore, this option is incorrect.

- **Option 2: Hugo de Vries**: He is known for his work on mutations and for coining the term "mutation." He was not aware of Mendel's work and did not relate chromosome behavior to Mendel's laws. Thus, this option is also incorrect.

- **Option 3: Sutton and Boveri**: These two scientists independently concluded that the behavior of chromosomes during cell division (meiosis) is analogous to the behavior of genes as described by Mendel. They used this understanding to explain Mendel's laws of inheritance. This makes this option the correct answer.

- **Option 4: Beadle and Tatum**: They are known for their work on the one gene-one enzyme hypothesis, which is unrelated to the question about chromosome behavior and Mendel's laws. Therefore, this option is incorrect.

3. **Conclusion**: The correct answer is **Sutton and Boveri**, as they noted the parallel between chromosome behavior and gene behavior and used this to explain Mendel's laws.

### Final Answer:
**Sutton and Boveri** are the scientists who noted that the behavior of chromosomes was parallel to the behavior of genes and used chromosome movement to explain Mendel's law.

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