Further Development 10.8: Defects of the Fushi tarazu Mutant Embryo

Defects seen in the fushi tarazu mutant. Anterior is to the left; dorsal surface faces upward. (A) Scanning electron micrograph of a wild-type embryo, seen in lateral view. (B) A fushi tarazu-mutant embryo at the same stage. The white lines connect the homologous portions of the segmented germ band. (C) Diagram of wild-type embryonic segmentation. The areas shaded in purple show the parasegments of the germ band that are missing in the mutant embryo. (D) Transcription pattern of the fushi tarazu gene. (C. after T.C. Kaufman et al. 1990. Adv Genet 27: 309-362.)