title: Pachytene analysis of acrocentric human chromosomes.
mesh_terms: D002466:Cell Nucleolus / Q000648:ultrastructure; D002901:Chromosomes, Human, 13-15 / Q000648:ultrastructure*; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure*; D006801:Humans; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D012728:Sex Chromatin / Q000032:analysis; D013194:Staining and Labeling; D013737:Testis / Q000648:ultrastructure