There’s big business in genealogy. Whether it’s a family tree that goes straight up and down like a mighty oak, or stretches east and west into dozens of brambles, people want to know their genetic makeup. Family history site Ancestry.com boasts 20 million members. 23andMe has a database of over 5 million members, and MyHeritage has approximately 2.5 million. That’s more than 27.5 million people, and that’s only counting three brands out of 50+ on the market. MIT Technology Review estimates that if the current level of public interest continues, commercial genetic databases will hold the info of 100 million people by 2021.
