How many generations back can DNA be traced?

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Tags

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