Unusual Movement of the Daughter Chromosome Group in Telophasic Cells Following the Exposure to Ultraviolet Microbeam Irradiation

Abstract

Using phase cinematography the behavior of daughter chromosome groups in silkworm spermatocytes was investigated at telophase after exposure to ultraviolet microbeam partial irradiation. Cells that received partial, ultraviolet microbeam radiation in a restricted area at telophase moved rapidly from the irradiated pole to the non-irradiated opposite pole. Exposure of several other parts of the cell or the 2 poles in cells at telophase induced no such unusual behavior of the chromosomes.