The DNA testing industry is stuck in a rut. Here's how 23andMe and Ancestry are plotting their next moves.

· Two of the biggest consumer genetics companies — 23andMe and Ancestry — have recently laid off workers, citing a slowdown in the market for their tests. 
· Consumers aren't flocking to send their spit into genetic testing companies in as high a numbers as the industry expected, an issue the industry has sounded the...