9. Flaming Red Hair, The Way to Go

Both red hair and blue eyes are caused by recessive genes, meaning they’re less likely to occur when compared to dominant traits like brown hair and brown eyes. For someone to have red hair and blue eyes, they must inherit the recessive genes for both traits from both parents.

Because these genes are less common in the general population, the combination of red hair and blue eyes is less frequently seen. Understanding the genetics behind hair and eye color helps us appreciate the unique diversity of physical traits found in people around the world.