This item applies Tl to a colonist's genome via design update.
Dominant Tail: Tl Tl
Tail: Tl tl
Tail is a solid marking that extends from the tip of the tail upwards towards the body. There should be no holes or splits in this marking, unless modified by ticking or something else that causes holes. It may have a hard, soft, or blended edge. In its dominant form, Tail may creep along the back and down the back legs. However, it will never come up onto the wings.
It can mask the tail tip colour, just like underbelly can.