[Localization of the fluorescent part of the Y-chromosome in nuclei of the chorionic symplast of the human placenta].

The localization of fluorescing Y-chromatin was studied in the nuclei of the chorionic symplast of the mature human placenta in cytological smears and histological sections stained with acrichin-mustard. Its localization within the nucleus and its relationship with nucleoli and nuclear membrane are shown. The significance of studying Y-chromatin in the placenta for population investigations in human cytogenetics and for the establishing of the affiliation of placenta structures is discussed.