Biology · Developmental Biology
Which one of the following statements about the cortical reaction in sea urchins is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The release of the cortical granules after sperm entry converts the vitelline membrane into the fertilization membrane which blocks polyspermy.✓
- 2The depolarization of the plasma membrane after sperm entry helps to block polyspermy.
- 3The exocytosed cortical granules during egg maturation contain the components of the zona pellucida.
- 4The entry of Ca 2+ ions into the egg initiates development.
Correct answer
The release of the cortical granules after sperm entry converts the vitelline membrane into the fertilization membrane which blocks polyspermy.
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