What can your spit tell you about your DNA?

Doctors always want your blood, but one day, a health care professional may ask you to open up and say, "Ptooey!" Why? Your spit holds a mother lode of biological information.

Man Warns Against Sending DNA Samples to Ancestry.com

Saliva testing - Wikipedia

How Does 23andMe Work: DNA Test Instructions & Reporting

This spit test promises to tell couples their risk of passing on common diseases

Collecting a Saliva Sample

23andme - DNA Tourism & How To Make A Trip BackTo Your Roots!

Meiosis vs. Mitosis: Unraveling Cell Division

How the Ion Proton Sequencer Works

The new £99 DNA test that tells you what to eat and how to exercise