Chromosome Aberrations inProtemnodon Bicolorafter Irradiation

Abstract
An analysis has been made of interchromosomal chromatid exchanges after irradiation of cultures of peripheral blood from a specimen of Protemnodon bicolor in the pre-mitotic period. The number and distribution of points of interchanges show that they occur at random within and between chromosomes, indicating that, unlike the cells of certain plant species investigated, the chromosomal elements in these cells are completely unorganized during later interphase.