title: Studies on the sal locus in Drosophila pseudoobscura. 3. The molecular pattern of DNA in active and inactive chromosome regions.
mesh_terms: D000818:Animals; D002869:Chromosome Aberrations; D002875:Chromosomes; D004247:DNA / Q000032:analysis*; D004330:Drosophila; D006570:Heterochromatin; D006579:Heterozygote; D008854:Microscopy, Electron; D012469:Salivary Glands
chemical_list: D006570:Heterochromatin; D004247:DNA