X-ray induced reciprocal translocations and dicentrics in human G0 lymphocytes

We have reinvestigated the question whether the assumed ratio 1:1 between the frequencies of symmetrical (translocations) and asymmetrical (dicentric) aberrations can be observed in human G0-lymphocytes. We have evaluated G-banded chromosomes in cells irradiated with doses of 1 and 2 Gy of 150 kV X-rays. The experimentally determined ratio of 1 . 04:1 is in agreement with the theoretically predicted value.