RADIOCYTOGENETIC EFFECTS ON BONE MARROW CELLS OF OPOSSUM IN VIVO

Abstract

Bone marrow cells of the opossum (Didelphis virginiana) were examined 24 hr following a whole-body 60Co radiation dose of 100, 300, 500 and 700 rads. Analysis of the number of chromosomes and the chromosomal aberrations resulted in a radiation sensitivity of 0.000605 aberrations/cell/rad and 0.59 × 10−6 aberrations/cell/rad2 for single-hit and multihit type damage respectively.