Abstract
Irradiation of embryo cells of Schistocerca gregaria in the two hours before mitotic anaphase produces a characteristic series of responses. An apparently insensitive stage is followed by the production of “stickiness” and side-arm bridges and finally by mitotic delay. Mitotic delay is complete at doses as low as 25 R. It is argued that “stickiness’ is due to a generalised physiological process and that side-arm bridges are due to a localised exchange of discrete sub-units of the chromatid. These conclusions are based upon the kinetics of appearance and dose-response and a comparison of haploid and diploid cells in a haplo-diploid mosaic embryo.
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Fox, D.P. The effects of X-rays on the chromosomes of locust embryos. Chromosoma 19, 300–316 (1966). https://doi.org/10.1007/BF00326920
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DOI: https://doi.org/10.1007/BF00326920