Figure 2. Collinear activation of Hox genes in paraxial mesoderm precursors.
(A) Table showing the collinear onset of Hox genes expression in the epiblast/tail-bud generated from (B) Chicken embryos hybridized in whole-mount with Hoxa (blue), Hoxb (yellow), Hoxc (red), and Hoxd (green) probes. Each panel shows the beginning of activation of each Hox gene in paraxial mesoderm precursors in the epiblast of the anterior primitive streak or in the tail-bud. Hox probe used is indicated on the top of each panel. Anterior is up. Dorsal view.