FIG. 1.

Patterning and morphogenesis mutants. In all panels, anterior is to the left, and dorsal is up. Stick figures to the right of each panel represent the dorsolateral eggshell appendages (DAs) for each strain. (a) Wild type. Brackets indicate the stalk (S) and paddle (P). Scale bar = 0.1 mm. (b, c) Patterning mutants alter the number or position of the DAs. (b) Strong ventralizing mutants such as gurken lack DA material; a nub of appendage (arrowhead) is barely visible on the dorsal midline. (c) Dorsalizing mutant fs(1)K10 produces a cone of appendage material. (d, e, f) Morphogenesis mutants produce two correctly positioned DAs with defective shapes. (d) An unusual allele of tramtrack69 creates the two nubs of the twin peaks mutant. Tubes form but fail to elongate. (e) Moose antler appendages give bullwinkle its name. (f) The short appendages of this quail (Villin) mutant are typical phenotypes caused by partial loss of actin regulatory components.