Is it possible to say when a gene will mutate

Options

A. Sometimes
B. Always
C. Never
D. The gene does not mutate

Answer

### Step-by-Step Solution:

1. **Understanding Mutations**:
- Mutations are defined as sudden and random changes in the DNA sequence of an organism. These changes can occur spontaneously without any external influence.

2. **Nature of Mutations**:
- Since mutations are random, it is inherently difficult to predict when they will occur. They do not follow a predetermined pattern or schedule.

3. **Induced Mutations**:
- While spontaneous mutations are unpredictable, induced mutations can be caused by external factors known as mutagens. Examples of mutagens include X-rays and certain chemicals like nitrous oxide.

4. **Predictability of Induced Mutations**:
- In cases of induced mutations, scientists can sometimes predict or induce when a mutation will occur by exposing organisms to mutagens. This allows for some level of control over the mutation process.

5. **Conclusion**:
- Therefore, it is not possible to always predict when a gene will mutate. However, in specific cases involving induced mutations, it may be possible to determine when a mutation will occur.

6. **Final Answer**:
- The correct response to the question "Is it possible to say when a gene will mutate?" is: **Sometimes**.