Genes involveding cancer are

Options

A. regulator gene
B. tumour gene
C. oncogenes
D. All of above

Answer

### Step-by-Step Solution:

1. **Understanding Cancer and Genes**: Cancer is a disease characterized by uncontrolled cell growth. Certain genes play a crucial role in the development of cancer.

2. **Types of Genes Involved in Cancer**:
- **Proto-oncogenes**: These are normal genes that can become oncogenes due to mutations. They are involved in cell growth and division.
- **Oncogenes**: These are mutated forms of proto-oncogenes that promote cancerous growth. When proto-oncogenes are activated through mutations (often caused by carcinogens), they can lead to cancer.
- **Tumor Suppressor Genes**: These genes normally inhibit cell division and prevent tumor formation. Mutations in these genes can lead to cancer as well.

3. **Carcinogens**: These are substances that can cause mutations in DNA, leading to the activation of oncogenes or inactivation of tumor suppressor genes.

4. **Conclusion**: The genes primarily involved in cancer are oncogenes, which arise from mutated proto-oncogenes. Therefore, the correct answer to the question is that oncogenes are the genes involved in cancer.

### Final Answer:
The genes involved in cancer are oncogenes.

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