I have this theory that first borns inherit more from the father, the second one looks more like the mother, and the third one is anybody's guess. At least, I resemble my dad more in the face shape and features. My mom's side contributed the big chest, but I don't know where my big feet came from. Our first child, a girl, looks like my husband. She also inherited his straight hair. Our son, who was second in line, looks more like me and has my behavioral traits. Our third, a girl, didn't look much like either of us. Unfortunately, we gave them all birth defects that came out of nowhere, so who knows?