Maybe so, but fathers can look a great deal like sons and they only share something like half their code and don't share a womb at all. Identical twins share t

Maybe so, but fathers can look a great deal like sons and they only share something like half their code and don't share a womb at all. Identical twins share their code and look even more alike. I think later life matters like obesity probably make a bigger difference. Being fat or gaunt can dramatically change somebody's appearance. Grooming habits as well. Spies deliberately adopting disguises can make themselves look quite different by modifying these sort of things.