Effect of X-Rays on Chromatid Aberrations in Air and in Nitrogen

the elimination of loci is mainly due to their destruction and not their failure to be recombined away from damaged sites.For if an eliminated locus such as ri had undergone any appreciable multiplication in a mixedly infected bacterium, it seems unlikely that there could be a probability as high as 0.4 that not one of the r1 duplicates succeeded in any of the numer- ous matings to be recombined into an entirely healthy vegetative phage.Experiments on the cross reactivation of linked markers7 should assist in the understanding of these questions.Acknowledgment.-The author is greatly