Does one gene control human hair color?

no because many genes have to work together to make make something change.Explanation:The type and amount of melanin in hair is determined by many genes, although little is known about most of them. The best-studied hair-color gene in humans is called MC1R. Many other genes also help to regulate this process. Most people have two functioning copies of the MC1R gene, one inherited from each parent.

Ifound this on google “according to the findings, a foramen magnum positioned toward the base of the skull is found not only in humans, but in other habitually bipedal mammals as well.” i hope this you for what your looking for

It is evolution, because we all have some of the same traits like eye color or shape or ears.