Which of following gene is not related to normal body growth ?

Options

A. Protooncogene
B. Oncogene
C. Tumour suppresser gene
D. Gene related to programmed cell death

Answer

To determine which gene is not related to normal body growth, we need to analyze the options provided:

1. **Proto-oncogene**: These are normal genes that help regulate cell growth and differentiation. When mutated, they can become oncogenes, which can lead to uncontrolled cell division. Thus, proto-oncogenes are related to normal body growth.

2. **Oncogene**: These are mutated forms of proto-oncogenes that promote uncontrolled cell division and can lead to cancer. Oncogenes are not associated with normal body growth; instead, they contribute to abnormal growth patterns.

3. **Tumor suppressor gene**: These genes help regulate cell division and prevent tumor formation. They play a crucial role in maintaining normal body growth by inhibiting excessive cell division. Therefore, they are related to normal body growth.

4. **Gene related to programmed cell death (apoptosis)**: These genes are involved in the process of programmed cell death, which is essential for normal development and maintenance of tissue homeostasis. They are also related to normal body growth.

Based on this analysis, the gene that is not related to normal body growth is the **oncogene**.

**Final Answer**: Oncogene