CSUF exhibit answers questions about DNA testing and how it works

Most of the people flocking to use AncestryDNA, 23andMe and other popular DNA tests are focused more on learning their genetic heritage than the science behind the tests.
But once the results are in, especially if they have used more than one company, they may have questions: Why are the estimates for ethnicity different depending on the company? Why are there different terms for grouping geographic areas? And why do siblings — other than identical twins — have different ethnicity es