Who invented the techniques of genetic mapping ?

Options

A. Bateson
B. Morgan
C. Muller
D. Punnet

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the inventor of the techniques of genetic mapping. Genetic mapping is crucial in genetics as it helps locate genes on chromosomes.

2. **Identifying Options**: The options provided include Bateson, Morgan, and two other incorrect options. We need to evaluate these options to find out who invented genetic mapping.

3. **Evaluating the First Option (Bateson)**: Bateson made significant contributions to genetics, but he is not known for developing genetic mapping techniques. Therefore, this option is incorrect.

4. **Evaluating the Second Option (Morgan)**: Thomas Hunt Morgan is a prominent figure in genetics. He provided experimental evidence for the chromosomal theory of inheritance and made significant contributions to the understanding of linkage and sex-linked inheritance. Importantly, he is credited with the invention of genetic mapping.

5. **Understanding Genetic Mapping**: Genetic mapping, also known as chromosomal mapping, involves determining the relative positions of genes on a chromosome. Genes are arranged linearly, and their relative distances can be calculated based on their sequence.

6. **Recombination Frequency**: The relative distances between genes are represented graphically through recombination frequency. This frequency is essential for creating a genetic map, which visually represents the arrangement of genes on a chromosome.

7. **Units of Measurement**: In eukaryotic organisms, the unit of distance used in genetic mapping is called centimorgan. In prokaryotic organisms, a different unit known as map unit is used.

8. **Conclusion**: After evaluating all options and understanding the contributions of Thomas Hunt Morgan, we conclude that he is indeed the inventor of the techniques of genetic mapping.

**Final Answer**: Thomas Hunt Morgan invented the techniques of genetic mapping.

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