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Question
Which of the following layers of the ovum undergoes changes to prevent polyspermy when sperm contacts with it?
Which of the following layers of the ovum undergoes changes to prevent polyspermy when sperm contacts with it?
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Solution
The correct option is A Corona radiata
The cortical reaction is a process initiated during fertilization by the release of cortical granules from the egg, which prevents polyspermy, the fusion of multiple sperms with one egg. In contrast to the fast block of polyspermy which immediately but temporarily blocks additional sperm from fertilizing the egg, the cortical reaction gradually establishes a permanent barrier to sperm entry and functions as the main part of the slow block of polyspermy in many animals.
So, the correct answer is 'Corona radiata'.
The cortical reaction is a process initiated during fertilization by the release of cortical granules from the egg, which prevents polyspermy, the fusion of multiple sperms with one egg. In contrast to the fast block of polyspermy which immediately but temporarily blocks additional sperm from fertilizing the egg, the cortical reaction gradually establishes a permanent barrier to sperm entry and functions as the main part of the slow block of polyspermy in many animals.
So, the correct answer is 'Corona radiata'.
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