This kept making me think of Lessons in Chemistry despite being wildly different from that book in most respects. Take Lessons in Chemistry, make it about a biologist in the nebulous present day rather than a chemist in the 60's (? it's been a while since I read that), make the protagonist a deeply antisocial person whose entire life revolves around her work, give her a clone of herself made to be a perfect housewife, and make the central conflict covering up a murder instead of being a single mom. It's great, I loved it.