Morgan discovered sex linked inheritance first in

Options

A. Human beings
B. Sweet pea
C. Drosophila melanogaster
D. Guinea pigs

Answer

**Step-by-Step Text Solution:**

1. **Understanding Sex-Linked Inheritance**:
- Sex-linked inheritance refers to the transmission of traits that are associated with genes located on sex chromosomes (X or Y chromosomes). Traits can be carried from parents to offspring through these chromosomes.

2. **Identifying the Scientist**:
- The scientist who first discovered sex-linked inheritance is Thomas Hunt Morgan. He is a key figure in genetics.

3. **Historical Context**:
- In 1910, Morgan conducted experiments that led to the discovery of sex-linked traits. He observed the inheritance patterns in fruit flies.

4. **Model Organism**:
- Morgan used *Drosophila melanogaster*, commonly known as the fruit fly, for his experiments. This organism is widely used in genetic research due to its simple genetics and short life cycle.

5. **Conclusion**:
- Based on Morgan's work with *Drosophila melanogaster*, we can conclude that the correct answer to the question is that Morgan discovered sex-linked inheritance first in *Drosophila melanogaster*.

**Final Answer**: Morgan discovered sex-linked inheritance first in *Drosophila melanogaster*.

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