At fertilization, the sperm binds to a receptor on the surface of the egg and fuses with the plasma membrane, initiating the development of a new diploid organism. Which of the following statements about fertilization is false?
a. Binding of a sperm to its receptor on the egg induces an increase in cytoplasmic calcium.
b. The progression of metaphase II to anaphase is triggered by the activation of MPF.
c. Eggs are arrested at metaphase II of meiosis and fertilization leads to anaphase progression.
d. Once fertilized, secretory vesicles are exocytosed, leading to an alteration in the extracellular coat of the egg to prevent additional sperm entry.
Answer: b. The progression of metaphase II to anaphase is triggered by the activation of MPF.
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