I dunno, I’d bet my next house payment that she didn’t look Korean.
She was a Middle-Eastern Jewish girl. They can be very beautiful. And she looked exactly like a feminine version of her Son, since He got all His human DNA from her.
Not necessarily. Although Jesus got all his human DNA from Mary, every human being carries genetic material that is not physically expressed in that person. Jesus could have had features more like his grandfather's than his mother's, or more like his great-grandmother's.
Given the endogamous nature of their society, there might not have been a great deal of possible variation - blue eyes and blond hair not likely! - but there would be some, even without the additional genetic material of a human father.