TDF gene is the smallest gene in humans with

Options

A. 231 bp
B. 14 bp
C. 2968 bp
D. 3000 bp

Answer

### Step-by-Step Solution

1. **Understanding TDF Gene**:
- TDF stands for Testis Determining Factor. It plays a crucial role in male sex determination.

2. **Location of TDF Gene**:
- The TDF gene is located on the Y chromosome, which is known to be the smallest chromosome in humans.

3. **Size of the TDF Gene**:
- The question asks about the size of the TDF gene in terms of base pairs.

4. **Identifying the Size**:
- Among the options provided (231 base pairs, 14 base pairs, 2968 base pairs, and 3000 base pairs), the TDF gene is known to be the smallest gene with only 14 base pairs.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the TDF gene is the smallest gene in humans with **14 base pairs**.