title: Patterns of ribosomal DNA spacer lengths are inherited.
mesh_terms: D000818:Animals; D002875:Chromosomes / Q000378:metabolism; D003433:Crosses, Genetic; D004247:DNA / Q000378:metabolism; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D008297:Male; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D012270:Ribosomes / Q000378:metabolism*; D014981:Xenopus
chemical_list: D004247:DNA