Skin Color Vs. Blood Type

Slide 103 of 109

The pattern of skin color around the world shows that dark skinned people are more prevalent near the equator whereas light skinned people predominate toward the poles. However, other markers of diversity don't show such simple worldwide patterns. Blood types (A and B, shown above) show a much more complex distribution pattern, with most blood types being expressed nearly worldwide. These data show that racial characteristics are mostly "skin deep."