Final answer:
There is no scientifically justifiable way to divide the human population into racial categories. Race is a social construct and genetic markers for physical characteristics like skin color do not align neatly with racial categories.
Step-by-step explanation:
There is no scientifically justifiable way to divide the human population into racial categories. Biological anthropologists have shown that any way you draw the lines, there will be more variation within categories than between categories. Race is a social construct and genetic markers for physical characteristics like skin color do not align neatly with racial categories. For example, only about 15 out of thousands of genetic markers control for skin pigmentation. If we were to choose different genetic characteristics to classify people, we would have an entirely different set of races.