Discover the math and science behind how genetic genealogists can reliably identify relatives and trace ancestry using our DNA, despite the striking similarities among humans.
Are all humans 99% the same?    • Are all humans 99% the same? | Geneti...  


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Do Twins Have the Same DNA?    • Do Twins Have the Same DNA?  | Geneti...  
Genetic Genealogy 101: Principles You Need to Know    • Genetic Genealogy 101: Principles You...  

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Chapters

0:00 Introduction and Question
0:09 Understanding DNA Similarity
1:33 Single Nucleotide Polymorphisms (SNPs)
3:10 The Enormity of Genetic Variations
5:33 Genetic Testing and Identifying Differences
7:06 Conclusion



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