[Study of Y-chromatin in the buccal epithelium of man].

Investigation was carried on by fluorescent-microscopic technique, smears of buccal epithelium being stained with acrichinium-mustard gas. The extent, form, location in a nucleus and the frequency of Y-chromatin in human buccal smears were studied. In medico-genetic practice this method is employed for initial determination of chromosome sex in disease associated with anomalies of sex chromosomes.