Secrets in our DNA Preview
Some 30 million Americans have sent their DNA to be analyzed by companies like 23andMe and AncestryDNA. But what happens once the sample is in the hands of testing companies, and how accurate are their results? NOVA explores the power of genetic data to reveal family connections, ancestry, and health risks—and even solve criminal cold cases.
Previews + Extras
Half Sisters Unite Thanks to DNA Testing
S48 E1 - 4m 19s
Half-sisters share their unlikely story of finding one another through genetic testing, and what they learned about their family history along the way.
How—and why—DNA Testing Uses Biased Reference Databases
S48 E1 - 5m 20s
Because of the Eurocentric bias of genetic reference databases, DNA ancestry test results for individuals of African and Asian descent are often less detailed than results for individuals of European descent.
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