. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 44 THE ORIGIN OF GYNANDROMORPHS. Description.—The left side of the thorax of the gynandromorph was male, with a sex-comb and a shorter wing. Both eyes were red and female. The abdomen and genitalia were female. The body-color was wild-type through- out. Sections showed ovaries on both sides. Explanation.—An egg containing the lethal 6 X chromosome was fertilized by a wild-type X sperm. Either one of the X chromosomes being eliminated would account for the result. If the paternal X were
. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 44 THE ORIGIN OF GYNANDROMORPHS. Description.—The left side of the thorax of the gynandromorph was male, with a sex-comb and a shorter wing. Both eyes were red and female. The abdomen and genitalia were female. The body-color was wild-type through- out. Sections showed ovaries on both sides. Explanation.—An egg containing the lethal 6 X chromosome was fertilized by a wild-type X sperm. Either one of the X chromosomes being eliminated would account for the result. If the paternal X were eliminated the male parts would be lethal 6, and hence it is more probable that the maternal X was eliminated. /. I, or No. 1808. July 7, 1915. C. B. Bridges. Text-figure 27 (diagram). Parentage.—The mother was pure for the second-chromosome recessives purple, curved, and speck. The father was heterozygous for the dominant star (eyes). No sex-linked mutant characters were Text-figure 25. Text-figure 26. Text-figure 27. Text-figure 28. Description.—The gynandromorph was female throughout, except for the abdomen, which had male coloration on the left side and was twisted to the left. A perfect penis was present. The eyes were star. The male parts could not have shown the recessive second-chromosome characters, even had they been present. No testes or ovaries were found, but there was a genital tube with pointed cells like abnormal 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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Keywords: ., bookcentury1900, bookdecade1910, booksubjectkaryoki, bookyear1919
