By Libby Copeland
Ms. Copeland is the author of “The Lost Family: How DNA Testing Is Upending Who We Are.” She has written about the consumer genetics testing industry for the Washington Post, Time and Slate.
Feb. 16, 2021, 5:00 a.m. ET
The consumer genetics testing company 23andMe this month announced that it is going public through a merger with a company founded by the billionaire Richard Branson, in a deal that valued it at $3.5 billion. This was just the latest big deal for the industry: Last year, the Blackstone Group acquired a majority stake in Ancestry, a 23andMe competitor, for $4.7 billion.…