parents. She knew her parents gave her their genes, and neither were red heads. One possible explanation is that Sharon's aunts on her mother's side had red hair and so did their paternal grandmother. The chromosomes related to red hair must have been in her mother's genetic makeup. Sharon was just born with red hair. It doesn't matter who her parents are. Hair color is not determined genetically. her father really isn't her father. the red hair is created from a mixture of brunette and raven haired parents.