Discover how scientists can decode the genetic markers found in your DNA to trace your ancestral roots back 10,000 years. That's right, 10,000! And by studying the mitochrondial DNA passed down from your mother's side, scientists can determine those ancestral roots with 100 percent accuracy. So how does this compare to the markers passed down along your father's side? Learn all about the different effects maternal and paternal ancestry have on your genetic code and take a tour of the six steps scientists use to map DNA. What are the basic components of human DNA? And what process do scientists follow to decipher its code?

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