Grey crescent is the area:
Correct answer: B. Just opposite to the site of entry of sperm into ovum
- A. At the point of entry of sperm into ovum
- B. Just opposite to the site of entry of sperm into ovum
- C. At the animal pole
- D. At the vegetal pole
Explanation
When the sperm enters the egg during fertilization, it creates a "fertilization cone" or "fertilization cone cap" on the surface of the egg. Just opposite to this point of entry, a light-colored crescent-shaped region known as the "grey crescent" becomes visible after fertilization. The grey crescent is a significant developmental landmark that indicates the future dorsal side of the embryo. .
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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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