The cell in development and inheritance . CtoOp poo, of oto ^°o°0o^?^/^\\i//.//^&° D Wo >0 O °Q-. (The Fig. 123. — Formation of the tetrads and polar bodies in Cyclops, slightly schematic,full number of tetrads is not shown.) [RtJCKEkT.] A. Germinal vesicle containing eight longitudinally split chromatin-rods (half the somaticnumber). B. Shortening of the rods; transverse division (to form the tetrads) in Position of the tetrads in the first polar spindle, the longitudinal split horizontal. D. Ana-phase; longitudinal divisions of the tetrads. E. The first polar body formed; seco
The cell in development and inheritance . CtoOp poo, of oto ^°o°0o^?^/^\\i//.//^&° D Wo >0 O °Q-. (The Fig. 123. — Formation of the tetrads and polar bodies in Cyclops, slightly schematic,full number of tetrads is not shown.) [RtJCKEkT.] A. Germinal vesicle containing eight longitudinally split chromatin-rods (half the somaticnumber). B. Shortening of the rods; transverse division (to form the tetrads) in Position of the tetrads in the first polar spindle, the longitudinal split horizontal. D. Ana-phase; longitudinal divisions of the tetrads. E. The first polar body formed; second polarspindle with the eight dyads in position for the ensuing division, which will be a transverse orreducing division. give rise to six typical tetrads. An essentially similar account of thering-formation is given by Vom Rath in Eiichceta and Calanns, andby Riickert in Heterocope and Diaptomus. That the foregoing interpretation of the rings is correct, is beauti-fully demonstrated by the observations of Hacker, and especially of ORIGIN OF THE TETRADS 251 Ruckert, on a number of other copep
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcells, bookyear1902
