Fig. 6. Analysis of hen-1 and tax-6 mutants. The movements of (A) hen-1(tm501) mutant worms and (B) tax-6(p675) mutant worms after they had been grown at 15°C or 25°C (solid lines in each panel) or starved for 4 h at 15°C or 25°C before each experiment (dotted lines in each panel). The speed of instantaneous forward movements exhibited by individual worms in each experiment is indicated in italics (mean ± s.d.), showing that differences in navigational behavior cannot be simply attributed to differences in mobility.