atavistic

adjective

Definition:

recurrence in an organism of a trait or character typical of an ancestral form and usually due to genetic recombination

Example:

Her innate connection with arcane magic is tied to her atavistic clawed hands, like those of the demon in her family’s past.

Personal Commentary:

So here’s a good one for describing bloodline features (either Pathfinder’s Sorcerer bloodlines, or other hieratages). A side note, when you look this one up you find the noun version atavisim in the dictionary.