Cellular origins of bilateral symmetry in glossiphoniid leech embryos

@article{Weisblat1999CellularOO,
  title={Cellular origins of bilateral symmetry in glossiphoniid leech embryos},
  author={David A. Weisblat},
  journal={Hydrobiologia},
  year={1999},
  volume={402},
  pages={285-290}
}
In the embryos of glossiphoniid leeches, as in other spirally cleaving embryos, there is ambiguity as to how the early cleavages in the embryo relate to the bilateral symmetry of the adult. Traditionally, we have aligned the B–D axis of the 4-cell stage with the anterior–posterior (A–P) axis of the adult. This requires that the first cleavage be skewed with respect to the A–P axis. Here, we re-examine the fates and behaviours of early blastomeres and conclude that a more accurate representation… CONTINUE READING

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