Can we disprove theories of particle physics by failing to predict the next path a particle trace will take through a cloud chamber?
When you describe the path before hand, then do the experiment, and a different path is taken, you failed to predict the path.
When it comes to discussions of DNA transformations that occurred in the distant past it's a stretch to call any of it "predictions". It's more like describing what happened than in predicting that which can happen in the future.