Which of the following is associated with Alfred Sturtevant ?

Options

A. Genetic map
B. Incomplete dominance
C. Linkage
D. Mutation

Answer

To solve the question "Which of the following is associated with Alfred Sturtevant?" we will analyze each option provided and determine which one is correctly associated with Alfred Sturtevant.

### Step-by-Step Solution:

1. **Understanding Alfred Sturtevant's Contribution**:
- Alfred Sturtevant was an American geneticist known for his pioneering work in genetics.
- He is most notably recognized for constructing the first genetic map of chromosomes in 1911.

2. **Analyzing the Options**:
- **Option A: Genetic Map**:
- This is indeed associated with Alfred Sturtevant as he constructed the first genetic map using Drosophila melanogaster (fruit flies).
- **Option B: Incomplete Dominance**:
- Incomplete dominance is a genetic phenomenon where the phenotype of heterozygotes is intermediate between the phenotypes of the two homozygotes. This concept was introduced by Carl Correns, not Sturtevant.
- **Option C: Linkage**:
- Linkage refers to the tendency of genes located close to each other on a chromosome to be inherited together. This concept was first proposed by William Bateson and Gregor Mendel's work was expanded upon by Thomas Hunt Morgan, not Sturtevant.
- **Option D: Mutation**:
- The term mutation refers to changes in the DNA sequence and was widely discussed by Hugo de Vries. This is not directly associated with Sturtevant.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option A: Genetic Map**. This is the only option directly associated with Alfred Sturtevant's work.

### Final Answer:
**Option A: Genetic Map**