Blond hair dominates red hair. Why? Because blond hair is actually a very thin layer of the brown/black pigment called eumelanin. This layer reflects as blond when combined with the protein that hair is made of. read more
Red hair is less dominant than blonde hair, this is why it is the world’s rarest hair colour. Less than 0.6% of the world has red hair but 3–5% is blonde. read more
Red hair is caused by a mutation in the melanocortin 1 receptor. It is a recessive trait, indicating that two copies of the mutation for red hair are necessary for red hair in a person (you must inherit a copy from your mother, and a copy from your father to be a red head). read more