During which process does DNA replicate?

DNA replication occurs during the interphase of the cell cycle, specifically in the S phase (synthesis phase). During this phase, the cell's DNA is copied to ensure that each daughter cell will have an identical set of genetic material following cell division. This process is essential for both mitosis and meiosis, as it prepares the genetic material for distribution to the resulting cells.

While mitosis and meiosis do involve the separation of replicated DNA, they do not encompass the actual replication process. Cytokinesis, on the other hand, is the division of the cytoplasm after mitosis or meiosis, which occurs after DNA has already been replicated. Therefore, interphase is the correct choice since it is specifically the phase when DNA replicates in preparation for cell division.