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In oocytes of some vertebratesstage can ...

In oocytes of some vertebrates_____stage can last for months or years.

A

Diplotene

B

Diakinesis

C

Leptotene

D

Zygotene

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Oocytes**: Oocytes are immature female gametes found in vertebrates. They are crucial for reproduction as they develop into eggs. 2. **Identifying the Relevant Stage**: The question asks about a specific stage in the development of oocytes that can last for an extended period, sometimes months or years. 3. **Stages of Meiosis**: Oocytes undergo meiosis, which consists of several stages. The relevant stages of prophase I include leptotene, zygotene, pachytene, and diplotene. 4. **Focusing on Diplotene**: Among these stages, diplotene is known to be the stage where oocytes can remain arrested for a prolonged period. This stage is the fourth stage of prophase I. 5. **Duration of Diplotene**: In some vertebrates, oocytes can remain in the diplotene stage from late fetal life until just before ovulation. This can last for months or even years. 6. **Hormonal Influence**: The transition out of the diplotene stage occurs shortly before ovulation, triggered by a surge in luteinizing hormone (LH). 7. **Conclusion**: Therefore, the correct answer to the question is "diplotene" (or "dictotene"). ### Final Answer: In oocytes of some vertebrates, the diplotene stage can last for months or years. ---
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