Each chromosome composed of one chromatid in:-

Options

A. Anaphase-I
B. Anaphase-II
C. Metaphase-I
D. Metaphase-II

Answer

To determine in which phase each chromosome is composed of one chromatid, we need to analyze the different phases of cell division, specifically focusing on anaphase I, anaphase II, metaphase I, and metaphase II.

### Step-by-Step Solution:

1. **Understanding Chromatids**:
- A chromatid is one half of a duplicated chromosome. Before cell division, each chromosome consists of two sister chromatids, which are identical copies of the chromosome.

2. **Analyzing Anaphase I**:
- During anaphase I of meiosis, homologous chromosomes (each consisting of two sister chromatids) are pulled apart to opposite poles of the cell. Therefore, at this stage, each chromosome still has two chromatids.
- **Conclusion**: In anaphase I, chromosomes are not composed of one chromatid.

3. **Analyzing Anaphase II**:
- In anaphase II of meiosis, the sister chromatids are finally separated and pulled to opposite poles. At this point, each chromatid becomes an independent chromosome.
- **Conclusion**: In anaphase II, each chromosome is composed of one chromatid.

4. **Analyzing Metaphase I**:
- During metaphase I, homologous chromosomes line up at the equatorial plane of the cell. Each chromosome still consists of two sister chromatids.
- **Conclusion**: In metaphase I, chromosomes are not composed of one chromatid.

5. **Analyzing Metaphase II**:
- In metaphase II, the chromosomes (which are still in the form of sister chromatids) align at the equatorial plane. Each chromosome still consists of two sister chromatids.
- **Conclusion**: In metaphase II, chromosomes are not composed of one chromatid.

### Final Answer:
The correct answer is **anaphase II**, where each chromosome is composed of one chromatid.