@mw1525 Have you ever gender switched Cornelia? If you had, you would see there is absolutely no resemblance to Morty. I stand by my theory that premade family members are made individually with no use of the parents' genetics. The Bunches are a good example of this. I doubt there is a shared feature amongst the lot of them.
From my memory of "back in the day", my game only gave me zero slider sims as offspring to single parents.
@DivinylsFan Even if he were the offspring of Agnes, I cannot see any shared genetics. I haven't looked at any of the ghosts in his family tree but would be surprised if there were any likeness. Believe me, I have looked at all SV residents as both genders and have a good eye for family resemblance, both in-game and in real life. My son, jokingly I hope, calls me an eugenicist :p