Variation in the activity of nucleolar organizers and their ribosomal gene content.
D000663:Amphibians; D000818:Animals; D001001:Anura; D002455:Cell Division; D002466:Cell Nucleolus; D002869:Chromosome Aberrations; D003582:Cytogenetics; D004247:DNA / Q000032:analysis; D005260:Female; D005796:Genes; D006824:Hybridization, Genetic; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D012313:RNA; D012270:Ribosomes
D012313:RNA; D004247:DNA