H.J. Muller ws awarded Nobel Prize for

Options

A. His studies on Drosophila for genetic study
B. Proving that the DNA is a genetic material
C. Discovering the linkage of genes
D. Discovering the induced mutations by X-rays

Answer

**Step-by-Step Solution:**

1. **Identify the Full Name of H.J. Muller**: H.J. Muller stands for Herman Joseph Muller, who is a prominent figure in genetics.

2. **Understand His Area of Research**: Muller is known for his extensive research on fruit flies, specifically the species Drosophila melanogaster. This organism is commonly used in genetic studies due to its simple genetic structure and short life cycle.

3. **Focus on His Contribution**: Muller’s significant contribution to genetics was his work on mutations. He studied how mutations can be induced in organisms.

4. **Nobel Prize Award**: In 1946, Muller was awarded the Nobel Prize in Physiology or Medicine. This recognition was for his discovery related to mutations.

5. **Specific Discovery**: The specific discovery that led to his Nobel Prize was the production of mutations through X-ray irradiation. By exposing Drosophila to X-rays, he was able to induce mutations, which contributed greatly to the understanding of genetics.

6. **Conclusion**: Therefore, H.J. Muller was awarded the Nobel Prize for discovering the induced mutations by means of X-ray irradiation.

**Final Answer**: H.J. Muller was awarded the Nobel Prize for the discovery of the production of mutations by means of X-ray irradiation.

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