What I learned from home DNA testing

They promise to reveal everything from our ancestry to our chances of serious illness. But are DNA tests accurate and do they tell us anything worthwhile?There may come a time in everyone’s life when they find themselves sitting at the kitchen table on an otherwise unexceptional weekday morning, drooling saliva into a test tube in the spirit of scientific inquiry.The spit is for one of the home genetic-testing kits I’m sampling. A growing number of these kits (brands such as 23andMe,