Question

Immediately after ovulation, the mammalian egg is covered by a membrane, called as

• A. Chorion
• B. Zona pellucida
• C. Corona radiata
• D. Both B and C

Answer 1

The correct option is C Corona radiata

The corona radiata is adjacent to the zona pellucida, the outer protective layer of the ovum. It provides nutrients to the developing ovum. It binds spermatozoa and is required to initiate the acrosome reaction. Hence, immediately after ovulation, the mammalian egg is covered by the corona radiata membrane.

So, the correct answer is option C.