Recombination repair is a mechanism for generating a functional
DNA molecule from two damaged molecules, that to be repaired usin a
sister chromatid .
It is an essential process for dividing cells because a
replication fork may arrive at a damaged site, such as a thymine
dimer, before the excision repair system has eliminated
damage.
The process requires the presence of an identical or non
idenrtiacal sequence to be used as a template for the repair of the
break.