What is DNA replication?

DNA replication refers to the process by which DNA replicates or makes a copy of itself during cell division. When a cell divides, each of the resulting daughter cells must have its own complete genome. To do this, the cell must copy or replicate its entire genome before it divides. DNA replication makes this possible. DNA replication starts with the unzipping of the double helix structure of the DNA molecule, creating a Y-shaped replication fork and separating the two single strands of DNA. The two separated DNA strands act as templates for creating new, identical DNA strands. DNA replication results in the creation of two DNA molecules consisting of one new and one old chain of nucleotides. Following replication the newly created DNA automatically winds up into a double helix.