Demonstration of kinetochores and centrioles in spermatocytes of two species of cockroaches by silver staining

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Abstract
Light microscopy following silver staining of spermatocytes of German and Madagascar hissing cockroaches demonstrated: (1) the localization of a kinetochore in each autosomal synaptonemal complex during pachytene, and (2) visualization of centrioles in different stages of meiotic prophase. The presence of a “hairpin-like” twist and the nucleolus organizer region in the X-chromosome was observed only in the German cockroach.