"Mutations can be induced by X rays" was revealed by

Options

A. Stanley Milley
B. Bridges
C. Muller
D. Darlington

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which scientist first revealed that X-rays can induce mutations.

2. **Analyze the Options**: Look at the provided options to determine which scientist is associated with the discovery of X-ray induced mutations.

3. **Recall Relevant Experiments**: Remember that H. J. Muller conducted significant experiments using Drosophila melanogaster (fruit flies) in the years 1926 and 1927.

4. **Understand the Methodology**: Muller exposed the fruit flies to X-rays and observed the changes in their progeny after mating. This involved examining the genetic changes that occurred in the DNA of the fruit flies.

5. **Recognize the Significance of DNA Changes**: Understand that mutations occur when there are changes in the sequence of nitrogenous bases in DNA, which can be induced by physical factors like radiation.

6. **Conclude the Findings**: Muller's experiments demonstrated that the exposure to X-rays led to observable mutations in the offspring of the fruit flies, thereby confirming the mutagenic effect of X-rays.

7. **Acknowledge the Recognition**: Note that H. J. Muller was awarded the Nobel Prize in Physiology and Medicine in 1946 for his groundbreaking work in this area.

8. **Select the Correct Answer**: Based on the analysis, the correct answer to the question is option C: H. J. Muller.

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