Question

What is the result of sperm entry into the secondary oocyte?

Options

• The ovum immediately completes cytokinesis

• The ovum undergoes apoptosis

• The ovum is activated and resumes meiosis II

• The ovum remains arrested indefinitely

Answer 1

The entry of sperm into the secondary oocyte activates the ovum, which was previously arrested at Metaphase II of meiosis. This activation triggers the completion of meiosis II and formation of the mature ovum.