In oogenesis, haploid egg is fertilized by sperm at which stage?
Correct answer: D. Secondary oocyte
- A. Ovum
- B. Primary oocyte
- C. Oogonium
- D. Secondary oocyte
Explanation
The correct answer is:d) Secondary oocyteThe secondary oocyte is the immediate product of the first meiotic division (Meiosis I) of a primary oocyte. It is arrested in Metaphase II of meiosis. If fertilized by a sperm cell, the secondary oocyte will complete meiosis, producing a mature ovum and a second polar body. The secondary oocyte is the stage at which fertilization occurs.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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