The Sex Chromatin in Tachycines asynamorus (Orthoptera) and Its Implications

Abstract

The interphase nuclei of only a few tissues of males of Tachycines asynamorus exhibit one particularly condensed and large chromocenter, those of females two, on the contrary. This distribution of the sex chromatin indicates 1) failure of a dosage compensation such as in mammalian X's, and 2) the occurrence of a tissue-specific, functional heterochromatization of the one male X and of both female X's in several tissues.