My Mom's father was Cherokee Indian (I never got to meet him as he passed before I was born). Her mother was of Irish decent. My Dad's family is of Irish decent, too.
My Mom and both of my sisters have/had jet black hair and olive skin. I either got all my coloring from my Dad or.....well, I won't go there.....but I definitely do not have my Mom's side of the family in my genetics! I do favor my Dad in most ways. I even got the Irish name!!