title: Sixty years of mystery.
authors: Howard Hughes Medical Institute Research Laboratories, Department of Embryology, Carnegie Institution of Washington, Baltimore, Maryland 21210.
authors: A C
authors: AC
authors: Spradling
authors: G H
authors: GH
authors: Karpen
mesh_terms: D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics* / Q000254:growth & development; D005823:Genetics / Q000266:history*; D049673:History, 20th Century; D009154:Mutation