Sister chromatids are found in

Options

A. Mitotic metaphase
B. Meiotic metaphase
C. late telophase
D. both (A) & (B)

Answer

To solve the question "Sister chromatids are found in," we will analyze the options provided and understand the concept of sister chromatids.

### Step-by-Step Solution:

1. **Understanding Sister Chromatids**:
- Sister chromatids are identical copies of a chromosome that are formed during DNA replication. Each chromosome is duplicated to produce two sister chromatids, which are joined together at a region called the centromere.

2. **Identifying the Stages of Cell Division**:
- Sister chromatids are primarily observed during specific stages of cell division, particularly during mitosis and meiosis.

3. **Evaluating Each Option**:
- **Option A: Mitotic Metaphase**:
- In mitotic metaphase, sister chromatids are aligned at the cell's equatorial plane. This is a key stage where sister chromatids are clearly visible and are ready to be separated.
- **Conclusion**: This option is correct.

- **Option B: Meiotic Metaphase**:
- In meiotic metaphase, sister chromatids are also present as they align at the metaphase plate during meiosis. This is similar to mitosis, where sister chromatids are arranged for separation.
- **Conclusion**: This option is also correct.

- **Option C: Late Telophase**:
- In late telophase, the cell is nearing the end of division, and the nuclear membrane reappears. At this stage, sister chromatids have already been separated into two daughter cells, so they are not present as sister chromatids.
- **Conclusion**: This option is incorrect.

- **Option D: Both A and B**:
- Since both mitotic metaphase and meiotic metaphase contain sister chromatids, this option is correct as well.

4. **Final Answer**:
- The correct answer is **Option D: Both A and B**.