Mutation causing agents are called

Options

A. Mutagene
B. Cytogene
C. Crossing over
D. Linkage

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe agents that cause mutations.

2. **Defining Mutations**: Mutations are changes in the genetic material, which is primarily DNA in most organisms and RNA in some viruses. These changes can occur in the sequence of base pairs that make up the DNA.

3. **Identifying Mutation-Causing Agents**: The agents that induce these mutations are known as mutagens.

4. **Examples of Mutagens**: Mutagens can take various forms, including:
- **Physical Agents**: Such as UV rays and radiation.
- **Chemical Agents**: Harmful chemicals that can alter DNA.
- **Biological Agents**: Some viruses can also act as mutagens.

5. **Conclusion**: Therefore, the correct answer to the question is that mutation-causing agents are called **mutagens**.

---