Date of Award:
5-1975
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Biology
Committee Chair(s)
Hugh P. Stanley
Committee
Hugh P. Stanley
Committee
James T. Bowman
Committee
Paul B. Carter
Committee
Raymond T. Sanders
Abstract
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.
Checksum
83219f8a1ac1eed98abed5bf24455f50
Recommended Citation
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, Spring 1920 to Summer 2023. 8299.
https://digitalcommons.usu.edu/etd/8299
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