"We assayed the expression of four zygotic patterning genes that are first expressed in the embryo: three HOX genes (
lin-39,
mab-5 and
egl-5; Costa et al., 1988; Clark et al., 1993; Wang et al., 1993) and
lin-44, a wnt homologue required for the correct pattern of cell divisions in the tail (Herman and Horvitz 1994; Hermanet al., 1995). Like
vab-7, all are expressed in a normal number of cells (Fig. 7K-L; Table 3)."