ecological genes- Einsenburg

Ecological genes are those genes leftover from wilderness times. They can be found in dogs, cats, and humans, to name a few. Pets, though domestic and not in need of many of these traits, still act as if they are in the wild. Growing winter coats, shedding in the summer, burying waste and bones, and walking in circles before laying down are all unnecessary in houses. During was used to save food or hide their scent to prevent prey from finding them. Circling was used to pat down leaves and make a bed for themselves. Humans have teeth that are now unneeded, appendix's and tonsils are also unnecessary but have not disappeared because they do not harm us. Without causing harm, there is not natural selection occurring so our genes stay the same.