VARIED EXPRESSIVITY OF “NOTCHED”: Geographic Variation in the Penetrance and Expressivity of the “Notched” Mutation in Drosophila Macrospina Get access SIDNEY MITTLER SIDNEY MITTLER Illinois Institute of Technology Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Heredity, Volume 40, Issue 3, March 1949, Pages 59–61, https://doi.org/10.1093/oxfordjournals.jhered.a105988 Published: 01 March 1949