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spineless-aristapedia


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One of the homeotic mutations (q.v.) of Drosophila located at 3-58.5. The distal portions of the antennae are transformed into leg-like structures with claws. The homeotic mutations illustration on page 210 allows a comparison of a normal pair of antennae, each bearing a bristle-like arista (Fig. A) with a mutant antenna which lacks an arista and has distal claws (Fig. B). Mutations of the ssa gene demonstrate that legs and antennae are homologous structures and suggest that antennae of arthropods evolved from an anterior pair of legs. See metamerism.

Subjects: Genetics and Genomics.


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