We alike other members of the family.The reason for it to affect of DNA. DNA comes to us as a half of  our mother and the other half from father each.The DNA of the parents has copied from grand mother and grand father.the color of eyes and hair gained us generation by generation.Those features are transmitted by means of DNA.But there are insoluble problems of the gains of feature.e.g.Height can be depend on eating and exercises,sports etc.