The originally described mutation is dominant.
Wings remain small and unexpanded.
The phenotype of heterozygotes is not as severe as that of homozygotes. Wings of heterozygotes are often expanded but wrinkled, blistered and the surface finely pebbled and grayish. This phenotype is most noticeable in the head region prior to completion of head involution. Since the Drosophila literature invariable refers to Wrinkled as hid , this essay will conform to that convention, and not use the more proper name Wrinkled , which is the one recommended by FlyBase. The ability of hid to kill is not significantly augmented by the presence of an endogenous reaper gene.