Pathology If the Rb gene phosphorylation is defective, which of the following will happen? A Cell cycle will stop at GI phase B Cell cycle will stop at G2 phase C The cell cycle will progress and the cell will divide D There will be no effect on cell cycle as for Rb gene phosphorylation is not needed 💡 Explanation If the Rb gene phosphorylation is defective, which of the following will happen? ✓ Correct Answer: A. Cell cycle will stop at GI phase