If you're from a small tribe in an isolated part of the world then knowing who your ancestors were using DNA will show limited results. Meaning that it won't contain many different DNA groups in it. But if you're African American then you can bet that you have a wide range of DNA groups within you. DNA studies that charge African Americans lots of money to find their African tribe are deceiving you. We all will be percentage of various different tribes throughout the continent because our slaves ancestors mixed with each other upon their arriving here. Yoruba mixed with Bantu and so and so forth.
DNA is an interesting study that Whites have invented and the purpose behind it is military. They are combing DNA with known public records in order to determine who is who since we reincarnate. As far as we know Destee could actually be Harriett Tubman or Sojourner Truth or you could actually be Nat Turner reborn. Souls normally reincarnate into their immediate family unless the Egun want to send them to their extended family for safety concerns. Krackers want to know who is who so they will know who to target specifically. Also Blackmales can be put into the system and that makes it easier for them to set up outspoken and intelligent Blackmales for crimes involving DNA.
Trust me the U.S Kracker is doing the same thing under child support enforcement.