Phenotypes of BY/RM hybrid progeny.

RM, BY and RM/BY meiotic spore progeny were tested in triplicate using a plating assay and scored for resistance to the DNA damaging agents, MMS, 4-NQO, bleomycin and caffeine (See Materials and Methods). Strains were scored as follows: very sensitive (- -), sensitive (-), slightly sensitive (��), wild-type resistance (+) and increased resistance (+ +). nt, not tested.