title: Correspondence of banding patterns to 3h-thymidine labeling patterns in polytene chromosomes.
abstract: 3H-thymidine labeling frequencies over X chromosomal region 1A-4E of Drosophila melanogaster, were analysed with reference to chromosome sections with and without prominent bands. A correspondence was found between band sections and late start of silver grain labeling at the initial stage in combination with late labeling at the end stage of replication. A complementary situation is always to be found over puff/interband sections, where an early start of labeling at the initial stage is generally combined with early labeling completion at the end stage of replication.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002455:Cell Division; D002875:Chromosomes; D004331:Drosophila melanogaster; D005260:Female; D012730:Sex Chromosomes; D013936:Thymidine
chemical_list: D013936:Thymidine