Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed

Options

A. Recombinant DNA technology
B. transgenic mechanism
C. Mutation breeding
D. gene therapy

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process involving the use of chemicals and radiation to alter the base sequences of genes in crop plants.

2. **Identifying Key Terms**: The key terms in the question are "chemicals," "radiation," "change," "base sequences," and "genes." This indicates that we are looking for a genetic modification process.

3. **Defining Mutation**: The process of changing the base sequence of genes is referred to as "mutation." A mutation is a sudden, inheritable change in the genetic material.

4. **Understanding Mutation Breeding**: Mutation breeding is a specific technique that involves inducing mutations artificially. This is done to create variations in crop plants that can be beneficial for agriculture.

5. **Methods of Inducing Mutations**: Mutations can be induced using specific chemicals and radiation.
- **Chemicals**: Examples include acridine orange and bromouracil, which are known mutagens.
- **Radiation**: Gamma radiation is commonly used to induce mutations in crop plants.

6. **Conclusion**: Therefore, the process of using certain chemicals and radiation to change the base sequences of genes in crop plants is termed "mutation breeding."

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