An attempt to analyze the constitution of the chromosomes on the basis of sex‐limited inheritance in Drosophila

In several preliminary notes I have given a brief account of the origin of four mutations in the eye-color of the fly, Drosophila ampelophila.The heredity of these eye-colors may now be given in full, and the bearing of the results, on sex-limited inheritance in general, discussed.In addition to the eye-color data I shall also describe a few cases in which two other sexlimited characters have been studied in connectidn with eyecolor, namely : short proportionate wings and yellow body-color.A full account of the heredity of these latter two characters will be reserved, however, for later publication.Here they are used only in so far as they give an opportunity to study the mode of inheritance of three sex-limited characters present in one individual.1The experiments on Drosophila have led me to two principal conclusions :FIRST, that sex-limited inheritance i s explicable on the assumption that one of the material factors of a sex-limited character is carried by the same chromosomes that carry the material factor fcr femaleness.