The reason is simple: cells that have recently lost the functional BRCA1 or BRCA2 allele and that will later grow into tumors will also be unable to undergo recombination.
Důvod je prostý: buňky, jež nedávno ztratily funkční alelu BRCA1 nebo BRCA2 a jež se za jistý čas vyvinou v tumory, budou také neschopné podstoupit rekombinaci.