Question

In both mitosis and meiosis, _________ must occur for the process to continue to completion.

Answer 1

Chromosome replication must occur for the process to continue.

Answer 2

The right answer is DNA replication (or chromosome replication).

The replication phase is fast and reliable, and corresponds to the reproduction of DNA identically. During this phase there may be brewing but no information is lost. The replication takes place between the G1 and G2 phase of the cell cycle, it is the "S" phase.

Replication of DNA must respect two principles:

* The entire genome must be replicated at each cell division

* Each molecule of DNA is replicated only once per cell cycle.