Animals|Biological Clocks|Body Patterning|Cell Adhesion|Cell Adhesion Molecules|Cell Division|Cell Movement|Computational Biology|Fibroblast Growth Factor 8|Gene Expression Regulation|Intracellular Signaling Peptides and Proteins|Membrane Proteins|Mesoderm|Models, Biological|RNA, Messenger|Receptors, Notch|Signal Transduction|Somites|Wnt3A Protein