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Crossing-over occurs in the...

Crossing-over occurs in the

A

Leptotene

B

Pachytene

C

Diplotene

D

Diakinesis

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks in which stage crossing-over occurs during cell division. 2. **Identifying the Type of Cell Division**: We need to recognize that crossing-over is a process associated with meiosis, specifically during the first meiotic division. 3. **Stages of Meiosis**: Meiosis is divided into two main stages: Meiosis I and Meiosis II. The focus here is on Meiosis I, particularly on the prophase stage. 4. **Prophase I Stages**: Prophase I of meiosis is further divided into five stages: Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis. 5. **Locating Crossing-Over**: Crossing-over occurs during the Pachytene stage of Prophase I. This is when homologous chromosomes pair up and exchange genetic material. 6. **Conclusion**: Therefore, the correct answer to the question is that crossing-over occurs in the Pachytene stage of Prophase I during meiosis. **Final Answer**: Crossing-over occurs in the Pachytene stage of Prophase I. ---
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