A Fine-Structural Study of Aberrant Meiotic Cytokinesis in an Autosomal Male Sterile Mutant (ms(2)3R) of Drosophila melonogaster
Date of Award:
Master of Science (MS)
Hugh P. Stanley
Hugh P. Stanley
James T. Bowman
Paul B. Carter
Raymond T. Sanders
The ultrastructure of abnormal meiotic cytokinesis in an autosomal male sterile mutant of Drosophila melanogaster is described. In the mutant ms(2)3R mitotic cytokinesis proceeds normally, but abnormal meiotic divisions give rise to four spermatids developing in one cytoplasmic mass. The contractile ring which is responsible for cell constriction during cytokinesis appears to form and function normally during meiosis. Ring canals which form intercellular bridges between synchronously developing spermatids are also apparently normal. However, there is an apparent adhesion and subsequent disintegration of the furrow membranes after division is completed. In addition to double membrane fragments in areas of open communication between germ cells, occasional unattached ring canals within the spermatid cytoplasm were found. These findings suggest that cell fusion is the anomaly in meiotic cytokinesis of ms(2)3R. Some observations on abnormal nebenkern formation are also reported.
Laughran, Laura J., "A Fine-Structural Study of Aberrant Meiotic Cytokinesis in an Autosomal Male Sterile Mutant (ms(2)3R) of Drosophila melonogaster" (1975). All Graduate Theses and Dissertations. 8299.
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