Millions of people have family stories involving Native American, First Nations, or indigenous American heritage. Those legends encourage people to take DNA tests to shed light on the stories and discover the identity of Native American ancestors. It is important to first understand the circumstances that have allowed your Native ancestors to become lost in time. Estes starts by discussing how DNA works, how much of your native ancestor's DNA you might expect to inherit, and how to find that DNA. She explains the tools offered by testing companies, and also focuses on which haplogroups are found in specific tribes. -- adapted from Introduction.