Mutations can be categorized based on the kind of effect they have on an organism. blue eyes in humans are a result of a mutation in the oca2 gene, which controls the production of pigment melanin in the iris.

Mutations can be categorized based on the kind of effect they have on an organism. Blue eyes in humans are a result of a mutation in the OCA2 gene, which controls the production of pigment melanin in the iris.

This mutation is an example of a neutral mutation. Such mutations have no effect on an organism’s survival.