DNA replication:
The formation of new DNA molecules that are identical, in every way, to the original molecule ensures that the inherited information is passed on with ever so slight changes when a cell reproduces. While the cell is between cell divisions, the DNA molecules undergo replication. This is when they form exact copies of themselves. The double helix begins to separate, and both pieces contain half the original information. This occurs so that the nucleotides can form a new half from the existing template.
If the original DNA helix is called the parental DNA, the two resulting helices can be called daughter helices. Each of these daughter helices can be called daughters, and is nearly the same copy of the parental helix but same minor changes may have occurred due to mutations. DNA replication is semi conservative, meaning one parental strand is always passed on to the daughter helix of DNA.