Recreational DNA Testing: More Than Finding Your Ancestry. The tv ads offer an inexpensive way to discover details about your ancestry by purchasing a DNA test kit online, spitting in a tube and shipping it off to total strangers. In a few weeks, you get a report breaking down your ethnic heritage. If you are interested, you can take it further to see if you come from a royal bloodline or had ancestors who arrived on the Mayflower. This might…