The X-rays were used to induce mutation in Drosophila by

Options

A. Hooker
B. Morgan
C. Muller
D. Khurana

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the use of X-rays to induce mutations in Drosophila, a common model organism in genetic studies.

2. **Identifying Key Figures**: The question provides multiple choices: Hooker, Morgan, Muller, or Khurana. We need to identify who among these scientists is known for using X-rays to induce mutations.

3. **Researching Hermann Josef Müller**: Hermann Josef Müller is a prominent figure in genetics known for his work on mutations. He conducted experiments that demonstrated the effects of X-rays on genetic material.

4. **Müller’s Experiments**: In his experiments, Müller exposed Drosophila (fruit flies) to high doses of X-rays. He specifically focused on the effects of radiation on the genetic material in the eggs and sperm cells of the flies.

5. **Observing Results**: After exposing the flies to X-rays, Müller mated them and observed the offspring for mutations. His findings confirmed that X-rays could induce genetic mutations.

6. **Conclusion**: Based on Müller’s experiments and findings, we conclude that the correct answer to the question is Hermann Josef Müller.

**Final Answer**: The X-rays were used to induce mutation in Drosophila by Hermann Josef Müller.

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