molecular recombination and the repair of dna double-strand breaks ( dsb ) have been examined in the g-0 and s phase of the cell cycle using a temperature-sensitive cho cell line to test i ) if there are cell cycle restrictions on the repair of dsb 's ' ii ) the extent to which molecular recombination can be induced between either sister chromatids or homologous chromosomes and iii ) whether repair of dsb 's involves recombination ( 3 ) .
C1519334
sister chromatids
C0008633
chromosomes