Subject No. Age Sex Frag- ments Dicentcics Rings Exch- anges No. of Chromosome Aberrations No. of Cells with Aberrations Chrematid Breake Isogaps Remarks* Exposed, 175 rad (continued) 63 46 F 1 64 40 F 1 68 55 M 2 69 14 -F l 73 28 M 2 2 2 2 74 26 =F 1 1 1 5 78 47 ¥F i 79 49 M 1 80 56 M 82 60 M 3 2 Thyroid pathology Thyroid pathology 3 1 1 Crl 2 3 . Exposed, 70 rad 3 1 64 F 29 75 M 2 41 54 M 1 43 77 ~=OF 1 45 42 F 2 48 16 F 50 44 M 51 35 F 1 53 18 F 1 59 44 F 1 1 1 1 1 2 1 3 2 1 2 2 1 2 2 2 2 2 2 1 1 i 2 1 1 2 2 1 3 1 11 2 2 4 1 Thyroid pathology