what does dna tell us
Race and ethnicity have no real biological meaning. DNA can tell us all kinds of things. Genetic information can be used to uniquely identify a specific person using just a hair or a few drops of saliva. That data can also tell you if you have certain genetic ailments or are at an increased risk for others. But one of the most common services provided by companies who do consumer DNA testing is an analysis of your ancestry based on your genetics, and there are real problems with that idea, geneticist Manolis Dermitzakis argued in a Reddit AMA question-and-answer session on November 17.