Definitions for "Antennapedia"
A homeotic mutation of Drosophila, where a pair of legs replaces the antenna
Antennapedia is a hox gene first discovered in Drosophila which controls the placement of legs. A loss-of-function mutation in the regulatory region of this gene can result in the development of the second leg pair into ectopic antennae. By contrast gain-of-function alleles convert antenna into ectopic legs.