Of course in some families, all the children look just alike and in other families, all the children can have a different look. My own brother and I look nothing alike and most people would not think us brothers- he with dark skin, dark, straight hair, blue eyes and me with light, freckled skin, blonde curly hair and green eyes. I take after my mom's side and he takes after our dad's. He has twin daughters, one tall and skinny with light freckled skin, red hair, green eyes, and the other shorter, olive skinned, brown hair and brown eyes. It always amazes people that they are twins.