On ordered DNA replication in polytene chromosomes.
D000818:Animals; D001345:Autoradiography; D002875:Chromosomes / Q000378:metabolism*; D004261:DNA Replication; D004330:Drosophila; D012469:Salivary Glands / Q000166:cytology; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
D014316:Tritium; D013936:Thymidine