Linkage in Drosphila was first discovered

Options

A. Bridges
B. Mendel
C. Bateson and Punnet
D. Morgan

Answer

### Step-by-Step Solution:

1. **Understanding Linkage**: Linkage refers to the phenomenon where genes that are located close to each other on the same chromosome tend to be inherited together. This concept is crucial in genetics as it helps explain the inheritance patterns of traits.

2. **Historical Context**: The question asks about the discovery of linkage in Drosophila, a model organism widely used in genetic research.

3. **Initial Discovery**: The concept of linkage was first discovered by William Bateson and Reginald Punnett in 1906 while studying sweet peas (Lathyrus odoratus). Although this discovery was significant, it was not in Drosophila.

4. **Linkage in Drosophila**: The specific discovery of linkage in Drosophila melanogaster (fruit fly) was made by Thomas Hunt Morgan in 1910. Morgan's work with Drosophila established many foundational principles of genetics.

5. **Morgan's Contributions**: Thomas Hunt Morgan is often referred to as the "father of experimental genetics" due to his extensive research on Drosophila and his contributions to our understanding of genetic linkage and chromosome behavior.

6. **Conclusion**: Therefore, the correct answer to the question of who first discovered linkage in Drosophila is Thomas Hunt Morgan.

### Final Answer:
The linkage in Drosophila was first discovered by Thomas Hunt Morgan.

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