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Drosophila parkin, the ortholog of the human parkin gene, responsible for a familiar form of autosomal recessive juvenile… Expand The genes don juan (dj) and don juan like (djl) encode basic proteins expressed in the male germline. Both proteins show a… Expand SummarySpermiogenesis of X/Y males in Drosophila has been reinvestigated by light and electron microscopy. A description of… Expand Y chromosomal fertility genes are essential for spermatogenesis, but those genes which code for major structural components of… Expand In elongating spermatids of Drosophila melanogaster , the axoneme is believed to grow by the addition of microtubule subunits at… Expand Mitochondria in early spermatids of many insects aggregate and form a round body, the nebenkern. The nebenkern undergoes a… Expand The axial filament of Sciara coprophila does not conform to the usual 9 + 2 filament pattern but consists, rather, of as many as… Expand Morphological ly atypical mi tochondr ia have been reported by m a n y investigators. Those possessing a cupped shape have been… Expand Abstract A systematic study of differentiation of the spermatids in Drosophila melanogaster et virilis and Gelastorrhinus bicolor… Expand 1. Observations on the morphological changes of mitochondria preparatory to the formation of the nebenkern, as well as changes… Expand