Figure 10.

gd and Tl regulate the levels of ftz stripe expression in the direction of the d/v axis. Plotted are averaged expression intensities of gene stripes for ftz in wild-type-like embryos derived from (a) gd⁷ heterozygous mothers, (b) dorsalized mutant embryos from gd⁷ homozygous mothers, (c) wild-type-like embryos from Tl^10B heterozygous mothers, and (d) ventralized mutant embryos derived from Tl^10B homozygous mothers. Expression intensity (y-axis) is plotted against the location along the stripe in the direction of the d/v axis as described in [12]. Each of the seven ftz stripes is shown in a different color and the error bars give the 95% confidence intervals for the means. The differences in expression seen in wild-type embryos in the direction of the d/v axis are not seen in the mutant embryos.