A new C. briggsae Fog gene.

Young adult animals of the following genotypes were photographed using DIC optics. A. Wild-type XX hermaphrodite. B. Wild-type XO male. C. v76 XX female. D. v76 XO Fog male. Expanded images of the boxed regions are shown on the right. Anterior is left and ventral down. The hermaphrodite vulva is indicated with a black arrow, and the male tail with a blue oval. Oocytes are marked with a red “o”, sperm with a blue arrow, and a one-celled embryo in the wild type with and “e”.