... to the effects of a delay in the formation of the ICM and subsequently the epiblast, even though this could be a contributing factor. In summary, a better understanding of the spatial and temporal cleavage patterns of the mouse embryos has allowed us to undertake studies of the developmental properties...

... by Company of Biologists 1997 Sicyonia Crustacea Decapoda mitotic spindle cleavage pattern cell contact The essential element involved in determining embryonic cleavage patterns is the placement of the cleavage planes ( Freeman, 1983 ). It is widely accepted that the cleavage plane...

... vegetal hemisphere. 21 12 1995 © 1996 by Company of Biologists 1996 ascidian embryogenesis gastrulation cytoplasmic determinants cleavage pattern cytoplasmic transfer An animal-vegetal axis can be recognized in the eggs of many kinds of animal. In most cases, the animal...

... did not affect formation of this latter axis. The cleavage pattern of the embryos that were deficient in posterior-vegetal cytoplasm (PVC) exhibited radial symmetry instead of the complicated bilateral symmetry of normal embryos. Detailed comparisons of cleavage patterns revealed the duplication...

... of larvae were followed. bilateral asymmetry left/right axis dorsoventral axis embryo cleavage pattern sea urchin Bilateral animals have three axes: anteroposterior, dorsoventral and left/right. Although a considerable amount is known of the establishment of the anteroposterior...

...: Strongylocentrotus purpuratus, S. droebachiensis, Lytechinus pictus, Clypeaster rosaceus, Heliocidaris tuberculata and H. erythrogramma . The results indicate that there is no single relationship between the early cleavage pattern and the dorsoventral axis for all sea urchins; however, specific relationships exist...