dpy-26(n199) is XO viable, XX lethal. eDp26 is a duplication of the left end of X, attached to X in an inverted orientation. Strain gives non-Dpy Egl hermaphrodites, intersexes, males and dead eggs.

eDp26 is a duplication of the left end of X, attached to X in an inverted orientation. CB4950 is homozygous for eDp26, which is XX viable and XO lethal. XX hermaphrodites are slightly small and slightly Egl.