A. MOLECULAR REPAIR DNA Repair (Recombination Repair) 1 __ occurs when the excision of a bulky adduct or an intrastrand pyrimidine dimer fails to occur before DNA replication begins. 2 Replication results in two homologous (“sister”) yet __ 3 the sister duplex that originally contained the gap carries in its daughter strand a section originating from the parent strand of the intact sister, which in turn carries in its parent strand a section originating from the daughter strand of the damaged sister— a process of __