Jenkins price
Ch. 23: Fleeming Jenkin Revisited 1. The theory that any variation should be blended back into the population, over time 2. With blending inheritance, no variations can actually occur and prevail. Natural selection is based on variations in nature, so natural selection would not be possible if all variations were blended back into nature. 3. Jenkin’s blending argument refers only to single, marked variations, not to the continuous recurrent variations that Darwin preferred.