In which stage of meiosis the chromosomes appear thick and short and located near the periphery of nucleus -

Options

A. Diakinesis
B. Zygotene
C. Pachytene
D. Diplotene

Answer

To determine the stage of meiosis in which chromosomes appear thick and short and are located near the periphery of the nucleus, we can analyze the options provided:

1. **Dichinesis**: This is the correct answer. During this stage, chromosomes are fully condensed, making them appear thick and short. They are also positioned near the periphery of the nucleus.

2. **Zygotene**: This stage is part of prophase I of meiosis and is characterized by the pairing of homologous chromosomes (synapsis). The chromosomes are not yet fully condensed in this stage, so this option is incorrect.

3. **Pachytene**: This stage follows zygotene and is characterized by the presence of crossing over between non-sister chromatids. While chromosomes are more condensed than in zygotene, they are not at their thickest and shortest form, so this option is also incorrect.

4. **Diplotene**: In this stage, the homologous chromosomes begin to separate, and the chiasmata (points of crossing over) become visible. The chromosomes are still not at their thickest and shortest form, making this option incorrect as well.

Thus, the correct answer is **Dichinesis**, where chromosomes are thick, short, and located near the periphery of the nucleus.

### Step-by-Step Solution:
1. **Identify the question**: Determine which stage of meiosis has chromosomes that are thick and short and located near the periphery of the nucleus.
2. **Analyze each option**:
- **Dichinesis**: Correct; chromosomes are fully condensed.
- **Zygotene**: Incorrect; chromosomes are not fully condensed.
- **Pachytene**: Incorrect; while chromosomes are more condensed, they are not at their thickest.
- **Diplotene**: Incorrect; chromosomes begin to separate and are not fully condensed.
3. **Conclude the correct answer**: The stage of meiosis is **Dichinesis**.