Pachytene analysis of human acrocentric chromosomes.
D000328:Adult; D002466:Cell Nucleolus; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D006570:Heterochromatin; D006801:Humans; D008297:Male; D008540:Meiosis; D013194:Staining and Labeling; D013737:Testis / Q000166:cytology
D006570:Heterochromatin