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Changes in the fluorescence patterns of translocated Y chromosome segments in Drosophila melanogaster
Authors:Orsetta Zuffardi  L Tiepolo  Silvana Dolfini  C Barigozzi  M Fraccaro
Institution:(1) EURATOM Unit for Human Radiation and Cytogenetics, Institute of General Biology of the Medical Faculty, University of Pavia, Italy;(2) Institute of Genetics, University of Milan, Italy
Abstract:Fluorescence analysis after quinacrine staining in squashes of Varese wild stock male larval ganglia confirmed that the Y chromosome has four characteristic sections of bright fluorescence. In one Y/X and in one Y/III translocation the section of bright fluorescence on the short arm of the Y is no longer bright when translocated onto the terminal portion of the X and on the right arm of the III chromosome, respectively. Fluorescence analysis has also permitted the identification of a structurally abnormal Y chromosome in a cell line of Drosophila melanogaster established in vitro. The findings in the two translocations call for caution in the interpretation of structural rearrangements by fluorescence analysis.
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