During S phase of the cell cycle, a chromosome suffers a deletion that removes its centromere. This deletion is unrecognized by the DNA repair machinery. When would it be most likely for this deletion to be detected, and what would be the consequences of its detection?
1. It would be detected at the G1 checkpoint, and cell division would be arrested.
2. It would be detected at the G1 checkpoint, and cell division would be accelerated.
3. It would be detected at the M checkpoint, and cell division would be arrested.
4. It would be detected at the M checkpoint, and cell division would be accelerated.