Fig. 2. Vulval location behavior. The x-axis represents the number of vulva encounters measured until a tested male stopped at the hermaphrodite vulva. The y-axis represents the distribution of males in the tested group that located the vulva at each vulva encounter. (A) egl-46(+) versus egl-46(sy628). Both strains have ceh-26::gfp III; him-5(e1490) V in the background. (B) egl-46(+) versus egl-46(n1127). Strains in B contain him-8(e1489) IV. (C) egl-44(+) vs. egl-44(n1080). Animals in C are all with him-5(e1490) V. In each assay, similar number of wild-type control males and mutant males were examined at same time using the same microscope.