Research NewsLimb Development

Gene Ties Arthropods Together

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Science  24 Nov 1995:
Vol. 270, Issue 5240, pp. 1297
DOI: 10.1126/science.270.5240.1297a

Summary

Boston—Scientists have argued that insects, which have unbranched limbs, and crustaceans—with branched ones—are two very distinct groups. New developmental evidence, however, points to a much closer relationship. Limb branching in both groups is a second-order phenomenon, scientists report, affected by a single gene, called Distal-less (Dll). It shouldn't be used to separate the groups, but to bring them together (see Report on p. 1363).