. The cell in development and inheritance. Cells. !ki\ »^ o°oo K9\ ! J â nOS 0 ' Jo°o°fi '> a. %?0 o'Loo go oo?,<^oVocg o o,. .'oOOOOO °0 0 O D Fig. 123. â Formation of the tetrads and polar bodies in Cyclops, slightly schematic. (The full number of tetrads is not shown.) [RUCKERT.] A. Germinal vesicle containing eight longitudinally split chromatin-rods (half the somatic number). B. Shortening of the rods; transverse division (to form the tetrads) in progress. C Position of the tetrads in the first polar spindle, the longitudinal split horizontal. D. Ana- phase ; longitudinal divis
. The cell in development and inheritance. Cells. !ki\ »^ o°oo K9\ ! J â nOS 0 ' Jo°o°fi '> a. %?0 o'Loo go oo?,<^oVocg o o,. .'oOOOOO °0 0 O D Fig. 123. â Formation of the tetrads and polar bodies in Cyclops, slightly schematic. (The full number of tetrads is not shown.) [RUCKERT.] A. Germinal vesicle containing eight longitudinally split chromatin-rods (half the somatic number). B. Shortening of the rods; transverse division (to form the tetrads) in progress. C Position of the tetrads in the first polar spindle, the longitudinal split horizontal. D. Ana- phase ; longitudinal divisions of the tetrads. E. The f^rst polar body formed; second polar spindle with the eight dyads in position for the ensuing division, which will be a transverse or reducing division. give rise to six typical tetrads. An essentially similar account of the rino--formation is given by Vom Rath in EucJicBta and Calamis, and by Riickert in Heterocope and Diaptonms. That the foregoing interpretation of the rings is correct, is beauti- fully demonstrated by the observations of Hacker, and especially of. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcells, bookyear1911
