What trait is determined by genetics alone?

First is the physical appearance like eye color and hair color and a lot more. Second is the blood type. Third is the skills that might be inherited from either parents.

There are many traits that are determined by genetics alone, as opposed to a combination of genetics and the environment. Good examples include blood type, eye colour and height. An example of a trait that is a combination of genetics and the envrionment is weight.

The correct answer is amu.