I have a second gen wolf, with an ul dad. Does that give a higher chance of an ul, or does genes only pass down from the parents?

No. If the pup itself doesn't have a boost or defect that wolf won't give an increased chance of having UL pups itself

Nope. Just the parents. Ancestry doesn't influence the chances of a defect/boost being passed down. So you can flip the bird to swindlers trying to sell wolves with chimera blood for more ;)

Thanks for answering(: Never knew. Well, now breeding just became a whole lot harder.