Transformation was discovered by

Options

A. Watson and crick
B. Meselson and stahl
C. Hershey and chase
D. Griffith

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who discovered the process of transformation in genetics. Transformation refers to the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material (DNA).

2. **Analyzing the Options**:
- **Option A: Watson and Crick**: They are known for discovering the structure of DNA in 1953, not for transformation.
- **Option B: Hershey and Chase**: They provided evidence that DNA is the genetic material through their experiments but did not discover transformation.
- **Option C: Meselson and Stahl**: They demonstrated the semi-conservative replication of DNA, which is unrelated to transformation.
- **Option D: Frederick Griffith**: He conducted experiments in 1928 that led to the discovery of the transformation principle using two strains of *Streptococcus pneumoniae*.

3. **Identifying the Correct Answer**: Frederick Griffith is credited with the discovery of transformation. He showed that non-virulent bacteria could be transformed into virulent ones by taking up genetic material from heat-killed virulent bacteria.

4. **Conclusion**: The correct answer to the question "Transformation was discovered by" is Frederick Griffith.

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