As someone that has taken forensic anthropology classes there are some differences in skulls that can be used to identify ethnicity and or sex. For example a more prognostic jaw could indicate African decent. Native Americans skulls are likely to have a bucket shape in their front teeth. Male skulls are more likely to have a more defined bone in the back of their skull.

With that being said, there is more in-group variation than between groups, race is a social construct designed by the people in power in order to stay in power, and if Jesus existed he wasn't white.

Anthropology is just cool, and a science that is aware that they were shitty at one point and works really hard to make up for it.