She pulled down statistics on racial variation in beard growth.

The survey also shows regional and racial variations.

At the same time Hooton maintained that no scientific basis existed correlating mentality with racial variation.

The human Y chromosome: racial variation and evolution.

These racial variations justify a more conservative approach in patients of Afro-Caribbean descent with proven sarcoidosis elsewhere.

There are significant racial variations in the male plumage (see Taxonomy).

At what point do differences in DNA become racial variation?

They're descendants of the old Arkonides but have developed many racial variations due to manifold environmental influences.

The Repoki, on the other hand, were a gangly, orange-skinned people with opaque white eyes, blunted features, and little racial variation.

In regards to racial variation within smaller regions, Taylor offers this passage about Europe's races: