Can I use it to test my ethnicity?
Your ethnicity is a combination of your geographical, cultural, and religious origins. Often, we look at DNA to find out where that DNA has come from. The maternal line and the paternal line are very unique in that they look very strictly at those lineages. Of course, if you go back many generations, you've got many different ancestors, and if we only look at two of those ancestors, we're essentially blinkers. We don't see everything in between. We might miss out all of your ancestors from, say, Africa. However, if your white chromosome comes from North America, we'll pick that white chromosome up. You have to look very carefully. The lines you look at are very precise. You have to ask your question “Where did my white chromosome come from?" or "Where did my paternal line and where did my maternal line come from?”