ABSTRACT
Evolution of species according to Charles Darwin depends on the accumulation of small variations in bodily structure or function that improves fitness for survival and reproduction. This gradual accumulation of new characteristics separates the animal or plant from the original parent species. Each of these small variations has to be transmitted to the next generation for them to accumulate there. Darwin called it his Pangenesis or Gemmule theory to imply that all the body organs (Greek pan—all) can generate (Greek—genesis create) the hereditary material or the gemmules. It is as though every cell in the body has a "vote" in the hereditary constitution of the offspring. However, Darwin's hypothesis could explain how disuse of a body part becomes inherited. Darwin's theory could also account for the regeneration of body parts after injury.
