______ used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes.

Options

A. Morgan
B. Suttonn
C. A. Strutevant
D. Henking

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about who used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes.

2. **Identifying Key Concepts**:
- **Recombination Frequency**: This refers to the likelihood that two genes will be separated during meiosis due to crossing over. The more frequently recombination occurs between two genes, the further apart they are on the chromosome.
- **Chromosomal Mapping**: This is a technique used to determine the relative positions of genes on a chromosome based on recombination frequencies.

3. **Historical Context**: The concept of gene linkage and recombination was explored by several scientists, but one individual is particularly known for quantifying this relationship.

4. **Identifying the Scientist**:
- The transcript mentions Albert Sturtevant, who is credited with developing the idea of a chromosomal map in 1913. He used recombination frequencies to estimate the distances between genes on a chromosome.

5. **Conclusion**: Based on the information provided, the correct answer to the question is **Albert Sturtevant**.

**Final Answer**: Albert Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes.

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