. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 296 THE SECOND-CHROMOSOME GROUP CHROMOSOME CARRYING DACHSOID. The four cultures above noted (table 139) all gave both male and female dachsoids, thus showing at once that the gene is not in the X chromosome. The mothers of all four were heterozygous for sepia, spineless, kidney, sooty, and rough—characters that cover practically the whole length of the third chromosome, and the same was true of several later cultures that also gave dachsoid. The dachsbid char- acter was distributed quit
. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 296 THE SECOND-CHROMOSOME GROUP CHROMOSOME CARRYING DACHSOID. The four cultures above noted (table 139) all gave both male and female dachsoids, thus showing at once that the gene is not in the X chromosome. The mothers of all four were heterozygous for sepia, spineless, kidney, sooty, and rough—characters that cover practically the whole length of the third chromosome, and the same was true of several later cultures that also gave dachsoid. The dachsbid char- acter was distributed quite at random with respect to these third- chromosome characters, showing that the gene is not in the third Text-figure 86.—Dachsoid venation. 860 shows the small size of the flj', with the wing pos- ture; 866 shows a typical wing. An F3 from a cross between speck and a fly that proved to be heter- ozygous for dachsoid produced 15 dachsoid, but unfortunately the speck character was not examined (2859, A. H. S.). An F3 pair (2926) gave a total of 40 flies, of which 4 were dachsoid, 26 speck, 10 wild-type, and none dachsoid speck. The count was aberrant in that there were far too few wild-type offspring; but the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington; Morgan, Thomas Hunt, 1866-1945; Bridges, Calvin B. (Calvin Blackman), 1889-1938; Sturtevant, A. H. (Alfred Henry), 1891-1970. Washington, Carnegie Institution of Washington
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