With the possibility of being able to insert inherited traits via recent genetic advances, I believe more modern methods are looking at genetic combinations tha

With the possibility of being able to insert inherited traits via recent genetic advances, I believe more modern methods are looking at genetic combinations that are repressed in the parent, but lethal to any offspring (or cause infertility in offspring). [1] [1] http://www.bbc.com/news/health-35024794 http://www.bbc.com/news/health-35024794