Fig. 7From: Differences in the genetic control of early egg development and reproduction between C. elegans and its parthenogenetic relative D. coronatus Early embryogenesis of D. coronatus. a single pronucleus; b formation of anterior constriction; c cleavage with central spindle; d formation of 2 nuclei, regression of constriction; e cytokinesis; f 2-cell stage; g, h a-p-oriented cleavage spindle in P1 and AB; i no polarity reversal with generation of anterior C and posterior P3. For further details, see text. Arrow, single polar body; asterisk, separated anterior cytoplasm. Scale bar, 10 µm. Orientation, anterior, leftBack to article page