. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 76 THE ORIGIN OF GYNANDROMORPHS. Von Siebold attempted to account for the gynandromorphs by the assumption that an insufficient number of sperm entered the egg, so that part of it lacked sufficient quantities of the male element. It is true that recent discoveries (Nachtsheim) have shown that more than one spermatozoon does usually enter the egg, but we can not explain the results on this basis in the sense intended by von Siebold. Von Siebold gave no clear account of the varietal chara
. Contributions to the genetics of Drosophila melanogaster. Drosophila melanogaster; Heredity; Karyokinesis. 76 THE ORIGIN OF GYNANDROMORPHS. Von Siebold attempted to account for the gynandromorphs by the assumption that an insufficient number of sperm entered the egg, so that part of it lacked sufficient quantities of the male element. It is true that recent discoveries (Nachtsheim) have shown that more than one spermatozoon does usually enter the egg, but we can not explain the results on this basis in the sense intended by von Siebold. Von Siebold gave no clear account of the varietal character of the male and female parts of the gynandromorph (see Boveri, p. 286), and in consequence it is not possible from his account to determine whether the male parts were like those of the Italian or German parent. It remained for Boveri, after 47 years, to attempt to make out, from the alcoholic remains of some of von Siebold's bees, the character of these parts. In order to better present here the conditions in the gynandro- morph, copies of Mehling's figures of the head of the normal bees are reproduced in text-figure 64, a, of the drone, h of the worker, and c. 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
