How far back does DNA ancestry go?

Related questions

1. How long does DNA last on a swab?
2. Can you tell someone's race by their DNA?
3. What is MyHeritage?
4. Does being sick affect DNA test?
5. Is 23 and me better than ancestry?
6. How does DNA test show ancestry?
7. What does 23andMe ancestry tell you?
8. Can a toothbrush be used for DNA testing?
9. Can a DNA test be done without the father?
10. What's the difference between my heritage DNA and ancestry DNA?

Tags

1. #chance
2. #within
3. #genomic
4. #mitochondrial
5. #brings
6. #maternal
7. #about
8. #recent
9. #ancestor
10. #sequence
11. #sharing
12. #matches
13. #generations
14. #times
15. #common
16. #matching
17. #means
18. #years