A nurse teaches about the final stage of oocyte maturation. When is meiosis II of the secondary oocyte normally completed?
Correct answer: C. Only after sperm penetration
- A. Before birth
- B. At the start of menstruation
- C. Only after sperm penetration
- D. Immediately before ovulation
Explanation
The secondary oocyte remains paused in meiosis II and completes it only when a sperm penetrates the oocyte. Meiosis does not normally finish before birth, during menstruation, or immediately before ovulation.
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About Reproductive Anatomy and Conception
Female and male reproductive organs, pelvic anatomy, gametogenesis, the menstrual cycle and the hormonal control of ovulation lead into fertilisation, implantation and early embryonic development. Questions distinguish ovulation from menstruation, fertilisation from implantation, and the normal anatomical changes that allow conception and pregnancy to occur.
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