Domestication has changed the inner workings of plants and animals. This is because of the goals humans were trying to accomplish with these animals. For example wild wheat and barley shed their seeds onto the ground, which made gathering hard to accomplish. We wanted to eat the plant seed but we also did not want to hurt our backs. So when we did find the rare specimen that could not spill it seeds, we took that home and bred it so it would make more plants with that favorable trait. Another example of domestication we can all relate too is dogs. There are hundreds of species of dogs, but in the beginning there was only one species of dogs. Domestication increased the gene pool as humans had many uses for them. Golden Retrievers were bred to retrieve dead ducks, Bulldogs were bred to control bulls, Chihuahuas were bred to be our plaything, etc. Apart from the increased species count and changes of the static quo DNA, domestication also caused the animals to become less aware as their brain and acute senses