When does DNA replication occur?

DNA replication occurs during the S phase of interphase in the cell cycle. During this phase, the cell’s entire DNA is replicated to ensure that both daughter cells receive a full set of genetic information. This is crucial for maintaining genomic stability and the proper functioning of the organism. After the S phase, the cell enters the G2 phase, where it prepares for mitosis, and the replicated DNA is checked for errors.