An X-Ray Induced Chromosomal Translocation in Apotettix eurycephalus Hancock (Grouse Locusts)

Abstract
One of 73 adult [male][male] x-rayed 6000 R-units showed in his F2 and following progeny that a portion of chromosome carrying 3 closely linked factors for color patterns had been translocated over to an entirely different linkage group. Cytological investigation disclosed that the translocation had been from one of the 1st, or smallest, pair of chromosomes to one of the 4th, or middle-sized pairs. Thus it was ascertained that the several factors for consplcuous, dominant color patterns of this species, closely linked, are carried by the smallest pair of chromosomes.