I think that I would say that our human nature doesn’t come from our parents, but from our humanity. That is, I have brown eyes because Mama Gorgias has brown eyes, and I have hairy arms because Papa Gorgias has hairy arms; but, I don’t have “Papa Gorgias human nature” or “Mama Gorgias human nature” or some sort of mixture thereof. Instead, I have a human nature because I’m human – it’s something that I share equally with every human who has ever lived and with every human who will ever live.
So, Jesus has a human nature because he was incarnate as a human. Perhaps some of his physical features are those inherited physically through Mary, but human nature is not a physical feature…