sentence: Human races are questionable as valid biological categories.
sentences_before: Humans often categorize themselves by race or ethnicity.
sentences_after: Human racial categories are based on both ancestry and visible traits such as skin color and facial features. Current genetic studies show that humans from Africa are most genetically diverse. But, human gene sequences are very similar compared to many other animals.
concept_name: human race
headings: Human Culture null Race and ethnicity
categories: Hominins