Morgan proposed that genetic exchange or recombination occurs in the region of

Options

A. Chiasmata
B. Linkage
C. Centromere
D. Telomere

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where Morgan proposed that genetic exchange or recombination occurs during meiosis.

2. **Identifying Key Terms**: The key terms in the question are "genetic exchange," "recombination," and "Kaismata."

3. **Explaining Kaismata**: Kaismata are physical links between two non-sister chromatids of homologous chromosomes. This occurs during the first metaphase of meiosis.

4. **Role of Kaismata in Recombination**: During the first metaphase of meiosis, crossing over occurs at the kaismata. This is where genetic material is exchanged between the non-sister chromatids, leading to genetic recombination.

5. **Evaluating Other Options**:
- **Linkage**: This refers to the close association of genes on the same chromosome but does not involve crossing over.
- **Centromere**: This is the constricted region of a chromosome that separates it into two arms and is not involved in recombination.
- **Telomere**: This is the end of a chromosome and does not participate in genetic exchange.

6. **Conclusion**: Based on the evaluation, the correct answer is that Morgan proposed that genetic exchange or recombination occurs in the region of Kaismata.

**Final Answer**: Morgan proposed that genetic exchange or recombination occurs in the region of Kaismata.

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