The complex formed by a pair of synapsed homologous chromosomes is called:

Options

A. Equatorial plate
B. Kinetochore
C. Bivalent
D. Axoneme

Answer

To solve the question, "The complex formed by a pair of synapsed homologous chromosomes is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Synapsis**:
- Synapsis is the process during which homologous chromosomes pair up during meiosis. This pairing is crucial for genetic recombination and ensures that each gamete receives the correct number of chromosomes.

2. **Identifying the Complex**:
- When homologous chromosomes synapse, they form a structure that is recognized in genetics. This structure is essential for the proper segregation of chromosomes during cell division.

3. **Recognizing the Terminology**:
- The term used to describe the complex formed by a pair of synapsed homologous chromosomes is "bivalent." This term specifically refers to the paired homologous chromosomes that are aligned together during meiosis.

4. **Evaluating the Options**:
- Option 1: Equatorial Plate - This refers to the arrangement of chromosomes during metaphase, not the pairing of homologous chromosomes.
- Option 2: Kinetochore - This is a structure on the chromosome where spindle fibers attach, not related to the pairing of homologous chromosomes.
- Option 3: Bivalent - This is the correct term for the complex formed by synapsed homologous chromosomes.
- Option 4: Exonome - This term is not relevant in this context.

5. **Conclusion**:
- After evaluating the options, the correct answer to the question is **Option 3: Bivalent**.