Variations in the migration pattern of distal tip cells compared to control animals. In C. elegans, DTCs located on the anterior and posterior ends of the gonad primordium typically migrate in a symmetrical U-shaped pattern.
Any variation in the 'arm-like' form, structure or composition of the specialized tissue of the reproductive tract that produces gametes compared to control. In C. elegans the reproductive tract in the hermaphrodite has two equivalent gonad 'arms', while the male has a one-armed gonad.