I have a friend who is blonde. She is married to a brunette, and they have two kids. One child is brunette and one is ginger. Her mother and mother-in-law are both blonde, and her father-in-law is brunette. I don't know her father's hair color, or if any of them carry the "ginger gene". How can her daughter be ginger? Is this the result of family members carrying but not using the gene, or is it simply not possible for this to occur? Might her husband not be the father?
There is no way to determine paternity via hair color. It is very likely that each parent carries mutations in the MC1R gene without expressing the mutations physically. Carriers will not generally display the trait, and recessive traits can be carried for a long time within families without being expressed.
Updated on December 12, 2019
By Leah Lefler