Bacterial transduction is phage mediated genetic transfer and was discovered in salmonella by

Options

A. zinder and Lederberg
B. Tatum and Lederberg
C. Beadle and Tatum
D. Avery, Macleod and Mccarty

Answer

### Step-by-Step Solution:

1. **Understanding Bacterial Transduction**:
- Bacterial transduction is a process of genetic transfer mediated by bacteriophages (viruses that infect bacteria). It involves the transfer of genetic material from one bacterium to another through a virus.

2. **Identifying Key Scientists**:
- The question asks for the scientists who discovered this phenomenon in Salmonella. The options provided include Zinder and Lederberg, Tatum and Lederberg, Biddle and Tatum, and Avery, McLeod, and McCarty.

3. **Analyzing Each Option**:
- **Option A: Zinder and Lederberg**: They conducted experiments in 1951 on Salmonella typhimurium and discovered the process of transduction.
- **Option B: Tatum and Lederberg**: They are known for their work on conjugation, another form of genetic recombination, not transduction.
- **Option C: Biddle and Tatum**: They are not associated with the discovery of transduction; their work is less known in this context.
- **Option D: Avery, McLeod, and McCarty**: They are famous for demonstrating that DNA is the transforming principle in bacteria, not for transduction.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option A: Zinder and Lederberg**, as they discovered bacterial transduction in Salmonella.

### Final Answer:
Bacterial transduction is phage-mediated genetic transfer and was discovered in Salmonella by **Zinder and Lederberg**.

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