Final answer:
Homologous recombination is a DNA repair mechanism that uses information from an intact duplex to repair a damaged DNA strand.
Step-by-step explanation:
The process you are referring to is called homologous recombination, which is a DNA repair mechanism that uses the information contained in the other duplex DNA to repair a damaged region.
This repair mechanism relies on the presence of a homologous sequence on the other strand of DNA. The damaged DNA strand is cut, and the intact DNA strand from the other duplex is used as a template to accurately repair the damaged region.