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Fig. 1.

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Fig. 1.

Dose-response calibration curves and metaphase images of chromosomal aberrations induced in human lymphocytes by X-ray exposure. (A and B) Dose response curves with the 95% confidence interval delimited by dotted lines. The black dots (●) denotes data points with standard errors of the mean. (A) Dicentric yields, Y=(0.0011±0.0004)+(0.0119±0.0032)D+(0.0617±0.0019)D2, where Y is the dicentric yield, and D is the absorbed dose in Gy. (B) Translocation of chromosomes 1, 2, and 4, Y=(0.0015±0.0004)+(0.0048±0.0024)D+(0.0237±0.0014)D2, where Y is the translocation yield and D is the absorbed dose in Gy. (C) Dicentric chromosomes and their respective fragments are marked with an arrows and arrowheads, respectively. (D) Metaphases with painted chromosomes—1 (red), 2 (green), and 4 (yellow)—and an apparent two-way translocation involving chromosomes 2 and 4 (arrows).

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