The Cytology of the Sea Side Earwig Anisolabis Maritima Bon Part I
The Cytology of the Sea Side Earwig Anisolabis Maritima Bon Part I
S I Sidney Isaac Kornhauser
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KORNHAUSER strepsinema. Finally in the later strepsistene stage, when the chromatic spherule is given off, the y-element stains as deeply as the two x-elements. In crystal violet + alizarin the y-element is purple, and the xx-element brown with small purple granules in it; whereas the nucleolar sphere of the late strepsinema is deep purple. In methyl green + acid fuchsin, the y-element is red, and the xx-element green. As the two fuse, in stages corresponding to figures 25 and 26, the y-element... gradually loses its red color and becomes green, while the extruded nucleolar spherule is a deep red. We must, I believe, assume that the extrusion of this nucleolar spherule is in a vital way connected with the change in " stainability " of the y-element. V The twelve chromosomes of the primary spermatocyte meta- phase (Plate XXV, figs. 28, 29) are so widely separated that, in lateral views with very high magnification, one may focus sharply on each element in the spindle. Good lateral views of the xxy- hexad may be obtained not only in metaphase plates (figs.
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