A teacher was trying to show the different stages of a type of cell division to the students. At a particular stage , it was observed that the chromosomes were separating but there was no splitting of centromeres. This stage would be

Options

A. metaphase I
B. metaphase II
C. anaphase I
D. anaphase II

Answer

To solve the question, we need to analyze the stages of cell division, particularly focusing on meiosis, and determine which stage corresponds to the observation that chromosomes are separating without the splitting of centromeres.

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that during a particular stage of cell division, chromosomes are separating, but there is no splitting of centromeres. This indicates that the sister chromatids are still attached at the centromere.

2. **Identifying the Stages**: The options given are:
- Metaphase 1
- Metaphase 2
- Anaphase 1
- Anaphase 2

3. **Analyzing Metaphase 1**:
- In Metaphase 1, homologous chromosomes align at the metaphase plate. There is no separation of chromosomes at this stage, so this option is incorrect.

4. **Analyzing Metaphase 2**:
- In Metaphase 2, chromosomes align along the metaphase plate, similar to Metaphase 1, but this stage also does not involve separation of chromosomes. Therefore, this option is also incorrect.

5. **Analyzing Anaphase 1**:
- During Anaphase 1, homologous chromosomes are separated and pulled to opposite poles of the cell. However, the sister chromatids remain attached at their centromeres. This matches the observation of chromosomes separating without splitting of centromeres. Thus, this is a potential correct answer.

6. **Analyzing Anaphase 2**:
- In Anaphase 2, sister chromatids are separated as the centromeres split. This means that this stage does not fit the observation of no splitting of centromeres. Therefore, this option is incorrect.

7. **Conclusion**: Based on the analysis, the correct answer is **Anaphase 1** (Option C), where homologous chromosomes separate but sister chromatids remain attached at the centromeres.

### Final Answer:
The stage where chromosomes are separating but there is no splitting of centromeres is **Anaphase 1**.