Separation of homologous chromosomes during Anaphase -I is called:-

Options

A. Synapsis
B. Disjunction
C. Nondisjunction
D. Crossing over

Answer

To answer the question regarding the separation of homologous chromosomes during Anaphase I, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process of Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four haploid cells. It consists of two main stages: Meiosis I and Meiosis II.

2. **Identifying Anaphase I**: Anaphase I is a specific phase within Meiosis I. During this phase, homologous chromosomes (pairs of chromosomes, one from each parent) are separated and pulled towards opposite poles of the cell.

3. **Defining Key Terms**:
- **Synapsis**: This is the process where homologous chromosomes pair up during Prophase I.
- **Disjunction**: This refers to the separation of homologous chromosomes during Anaphase I.
- **Non-disjunction**: This is an error that can occur when homologous chromosomes fail to separate properly during Anaphase I or sister chromatids fail to separate during Anaphase II.
- **Crossing Over**: This occurs during Prophase I when homologous chromosomes exchange genetic material.

4. **Identifying the Correct Term**: Since the question specifically asks about the separation of homologous chromosomes during Anaphase I, the correct term is "disjunction".

5. **Conclusion**: Therefore, the separation of homologous chromosomes during Anaphase I is called **disjunction**.

### Final Answer:
The separation of homologous chromosomes during Anaphase I is called **disjunction**.

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