Question
The covering of ovum at ovulation is __________.
NEET
Zoology
Human Reproduction
2026
NEET 2026 (Re-NEET)
NEET Zoology Question (2026) — Solution
Options
- A. chorion
- B. endometrium
- C. zona radiata
- D. zona pellucida
Answer
D. zona pellucida
Step-by-step solution
At ovulation, the mammalian ovum (in the secondary oocyte stage) is released from the Graafian follicle. It is surrounded by two main coverings: 1. Zona pellucida: An inner, non-cellular glycoprotein layer secreted by the oocyte. 2. Corona radiata: An outer, cellular layer formed by the follicular cells (granulosa cells).
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