Strongest phenotypes include partial to full transformation of one or both eyes into antennae. Less severe adult phenotypes include excess bristles under the eyes, duplication of the more anterior set of scutellar bristles and a spoon-like curvature of the wings. Shows complete penetrance and variable expressivity.
exbrl is a suppressor of arista | increased number phenotype of obk1
L.E. Rost and M.P. Scott, 1989.