Final answer:
Prophase does not usually occur during interphase.
Step-by-step explanation:
The event that does not usually occur during interphase is b. prophase. Interphase is the phase of the cell cycle where the cell undergoes normal growth and prepares for cell division.
It consists of three stages: G1, S, and G2. During prophase, which is part of the mitotic phase, the chromatin condenses into visible chromosomes and the nuclear envelope breaks down.