What is oogenesis

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What is oogenesis

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Oogenesis is the process by which female gametes, or ova (eggs), are produced. It involves cell division and differentiation to create a mature egg cell capable of being fertilized. Step 1: Oogenesis begins before birth with diploid cells called oogonia in the fetal ovary. Step 2: Oogonia undergo mitosis and then enter meiosis I to become primary oocytes. These are arrested in prophase I and remain in this state until puberty. Step 3: After puberty, hormonal signals cause a few primary oocytes to resume meiosis I each month, completing it to form a large secondary oocyte and a small polar body. Step 4: The secondary oocyte begins meiosis II but is arrested in metaphase II. It is released from the ovary during ovulation. Step 5: If fertilization occurs, the secondary oocyte completes meiosis II, forming a mature ovum and another polar body.

What is oogenesis

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Step-by-step solution

Oogenesis begins before birth with diploid cells called oogonia in the fetal ovary.

Oogonia undergo mitosis and then enter meiosis I to become primary oocytes.

After puberty, hormonal signals cause a few primary oocytes to resume meiosis I each month, completing it to form a large secondary oocyte and a small polar body.

The secondary oocyte begins meiosis II but is arrested in metaphase II.

If fertilization occurs, the secondary oocyte completes meiosis II, forming a mature ovum and another polar body.

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