. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 40 THE ORIGIN OF GYNANDROMORPHS. No. 380. March 28, 1916. A. Weinstein. No diagram. Parentage.—The mother carried the genes for ruby and forked in one X and the genes for eosin and sable in the other X. The father was eosin-bar. Description.—The gynandro- morph was about half and half, the left side being mainly male and the right female. The left side of the head and thorax and the left wing were smaller and the left foreleg bore a partly double sex-comb. The left eye was eosin bar of
. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 40 THE ORIGIN OF GYNANDROMORPHS. No. 380. March 28, 1916. A. Weinstein. No diagram. Parentage.—The mother carried the genes for ruby and forked in one X and the genes for eosin and sable in the other X. The father was eosin-bar. Description.—The gynandro- morph was about half and half, the left side being mainly male and the right female. The left side of the head and thorax and the left wing were smaller and the left foreleg bore a partly double sex-comb. The left eye was eosin bar of the male type. The genitalia were double pos- teriorly; there was a penis with claspers and anterior to the right of this an ovipositor and female-type anal prominences. The abdomen was female in coloration, except at the tip on the left side, which showed the male banding. The right eye was red and of the broad hetero- zygous bar female type. Explanation.—A ruby forked X egg was fertilized by an eosin bar X sperm. Elimination of the maternal ruby forked X oc- curred. r' f. Text-figure 21. W^ B We B No. SS01122AAA7344512 Selection Experiment. January 18, 1917. T. H. Morgan, Plate 4, Figure 1 (diagram). Parentage.—The mother was notch, having therefore one X chromosome with the dominant gene for notch; the other X carried the recessives eosin and ruby. The father was likewise eosin ruby. Description.—The gynandromorph was male on the right side, except for spots of red (female) in the eosin ruby eye of that side. The coloration of the abdomen was male throughout. The genitalia were mainly male, but showed female parts. The left side was mainly female, having a red eye and a notch wing of slight type. No gonads were found in the sections examined, but it is probable that there were very rudimentary ovaries. Explanation.—An egg bearing the gene for notch was fertilized by an X sperm with the genes for eosin and for ruby. Elimination of a maternal X chromosome left the
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