All chromosomes of a cell are directed towards one side and are attached to the nuclear membrane, can be observed in

Options

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

Answer

To solve the question regarding which phase of cell division shows all chromosomes directed towards one side and attached to the nuclear membrane, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about a specific phase in cell division where all chromosomes are oriented towards one side and attached to the nuclear membrane.

2. **Identify the Phases of Prophase**: The question refers to stages of prophase in meiosis. The relevant stages to consider are:
- **Lipotent (Leptotene)**: The first stage of prophase where chromatin condenses into visible chromosomes.
- **Zygotin (Zygotene)**: The second stage where homologous chromosomes begin to pair.
- **Pachytene**: The third stage where chromosomes become thicker and shorter.
- **Diplotin**: The late stage of prophase where homologous chromosomes start to unpair.

3. **Analyze Each Option**:
- **Option A (Lipotene)**: During this stage, chromosomes are condensing and may be oriented towards the nuclear membrane.
- **Option B (Zygotin)**: In this stage, homologous chromosomes pair, but they are not necessarily all directed towards one side.
- **Option C (Pachytene)**: Chromosomes are thickened but are not specifically directed towards one side.
- **Option D (Diplotin)**: This stage involves unpairing of chromosomes, which does not fit the description.

4. **Conclude the Correct Answer**: Based on the analysis, the correct answer is **Option A (Lipotene)**, as it is the stage where all chromosomes are directed towards one side and attached to the nuclear membrane.

### Final Answer:
The correct answer is **Option A: Lipotene**.

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