Replication, in genetics, means the production of a DNA-copy.
In semiconserving replication, for example in human cells between mitoses, the first step is division of the double strand by the enzyme helicase.
The resultung single stands serve as a matrix for the synthesis of a new complementary strand by DNA-polymerase.
Einzelstrang - single strand
Leitstrang - leading strand
Folgestrang - following strand
Source: LadyofHats Mariana Ruiz / tikurion Michael Biech