Most Somalis (both North and South) have dark skin and curly afro hair. These are pure blooded Somali features. Any other features were absorbed by our ancestors when they mixed with the coastal non-Somali populations who still exist to some degree (reer xamar/barwani)
Look at these pictures from Laascaanood and Buuhoodle (both cities in the north populated by Somalis who no one would say mixed with Bantus or any other non-Somali people)
http://www.kalshaalenews.com/wp-content/uploa... (jet black skin and curly afro hair)
http://allssc.com/wp-content/uploads/2011/08/... (dark skin as far as the eye can see)
http://allssc.com/wp-content/uploads/2011/08/... (kids in Laascaanood celebrating eid)
http://afbakayle.com/wp-content/uploads/2013/... (dhulbahante elders at khaatumo state meetings)
How could light skin and wavy hair be pure blooded Somali features, when the vast majority of our people look nothing like that?