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First meiotic division during oogenesis ...

First meiotic division during oogenesis occurs in:
(a) First polar body
(b) Second polar body
(c) Primary oocytes
(d) Secondary polar body

A

First polar body

B

Second polar body

C

Primary oocytes

D

Secondary polar body

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding where the first meiotic division during oogenesis occurs, we can follow these steps: ### Step-by-Step Solution: 1. **Understand Oogenesis**: Oogenesis is the process of female gamete (ovum) formation. It begins with primordial germ cells that undergo mitosis to form oogonia. 2. **Formation of Primary Oocyte**: The oogonia undergo mitosis to produce primary oocytes. The primary oocyte is a diploid cell (2N) that is arrested in prophase I of meiosis until ovulation. 3. **First Meiotic Division**: The first meiotic division (meiosis I) occurs in the primary oocyte. This division is a reductional division that results in the formation of a secondary oocyte and the first polar body. 4. **Result of the First Meiotic Division**: After the completion of meiosis I, the primary oocyte divides to produce one secondary oocyte (which will eventually become the ovum) and one first polar body (which typically does not participate in fertilization). 5. **Conclusion**: Since the first meiotic division occurs in the primary oocyte, the correct answer to the question is option (c) Primary oocytes. ### Final Answer: (c) Primary oocytes ---
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