tsjok45 wrote on Jun 25, '09, edited on Jun 25, '09
A newly hatched nymph of the American grasshopper, Schistocerca americana.. One of the hallmarks of insect evolution is differential enlargement of hind legs between insect species. Changes in expression of a single homeotic gene, Ultrabithorax, may control this diversification. See the article by Mahfooz et al. on pages 4877–4882.