title: Atypical acrocentric chromosomes in Negro and Caucasian Mongols.
mesh_terms: D000293:Adolescent; D000328:Adult; D001741:Black or African American; D002648:Child; D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D008423:Maternal Age; D009030:Mosaicism / Q000453:epidemiology; D044465:White People