Chromosome rearrangements induced by various doses of 2:4:6-tri(ethyleneirnino)-l:3:5-triazine inDrosophila sperm have been studied in theF1 offspring: cytologioally in the X-salivary chromosomes of larvae, and genetically by the scoring of theMinute mutation. The majority of the rearrangements were of the same types as those induced by X-radiation, viz, simple and complex interstitial aberrations and no single-break, terminal ones. There were also partial rearrangements involving less than half of the treated chromosome which have not so far been reported in the X-ray material. The frequency of mosaic rearrangements is much higher than after X-radiation. At low and moderate doses there were as many mosaic aberrations as there were completes, but at the higher doses mosaics were less.
Volume 100, 2021
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