At the metaphase plate during metaphase Il of meiosis, there are :

Options

A. chromosomes consisting of one chromatid
B. unpaired duplicated chromosomes
C. bivalents (tetrads)
D. homologous pairs of chromosomes

Answer

**Step-by-Step Solution:**

1. **Understanding Meiosis**: Meiosis is a two-part process consisting of meiosis I and meiosis II. Each part involves different stages, including metaphase.

2. **Identifying Metaphase II**: In meiosis II, we focus on metaphase II, which follows the completion of meiosis I. During meiosis I, homologous chromosomes are separated, and two daughter cells are formed.

3. **Chromosome Configuration in Metaphase II**: At the metaphase plate during metaphase II, the chromosomes are aligned. However, it's important to note that these chromosomes are not in pairs as they were during metaphase I.

4. **Characteristics of Chromosomes in Metaphase II**: The chromosomes present at the metaphase plate during metaphase II are:
- **Duplicated**: Each chromosome has already been replicated during the S phase before meiosis began.
- **Unpaired**: Unlike metaphase I, where homologous chromosomes are paired, in metaphase II, the homologous pairs have already separated, leaving individual chromosomes (sister chromatids) aligned at the metaphase plate.

5. **Conclusion**: Therefore, at the metaphase plate during metaphase II of meiosis, there are unpaired but duplicated chromosomes.

**Final Answer**: Unpaired duplicated chromosomes.

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