A Comparison of Chromosomal Aberrations Induced by X-Ray and Ultra-Violet Radiation

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Abstract
X-ray radiation of the generative nucleus in Tradescantia pollen grains reveals that most of the chromosomes are effectively split into sister chromatids, with aberrations involving both chromatids at identical loci. Irradiation of the generative nucleus in the pollen tube results in only chromatid aberrations including a considerable number of chromatid deletions and occasional chromatid exchanges. U.-v. radiation of the generative nucleus in the pollen tube induces only simple chromatid deletions.

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