1. Three series of X-chromosome lethal mutations, from the mutator hi, from 300 r and from 12.5 kr of cobalt-60 γ radiation, all showing normal crossing over with y ct6 ras2 f, were analyzed for ...

Many years ago, I put forth the concept that the mutation rate of nonmalignant cells is insufficient to generate the large numbers of mutations that are present in human cancers 1. Instead, it was ...