How do the genes repsonsible for red hair work?

Question

I heard that the gene that leads to red hair also affects skin color?
Why is it not as simple as eye color genes?

Answer 1

Skin and hair pigment is made up of different types of melanin. There are two broad groups of melanin, eumelanin, which is brown, and phaeomelanin, which is red.

Answer 2

Genetics are more complicated than your biology teacher makes them out to be. Red hair occurs from multiple genes. Certain genes combine with it to make the skin fair an forcing the hair which is also skin cells to appear red.
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