Concerns about 23andMe's business prospects is raising questions about the genetic testing company's customer data.

In the wake of a big data breach and a sizable new round of layoffs, 23andMe's handling of sensitive personal data is in the spotlight.

The financial struggles of genetic testing and ancestry company 23andMe are raising questions about the security of customers' DNA and other data. The company announced Monday that it would lay off around 40% of its workforce -- about 200 employees -- and close its drug development arm in an attempt to cut costs.