This study has additionally revealed that turtles have a high number of olfactory receptor genes. More than 1,000 olfactory receptors were found in the Chinese soft-shell turtle, being one of the largest numbers found in a non-mammalian species. This finding also suggests that turtles have the ability to smell and detect a wide number of hydrophilic substances. Genes involved with taste perception, hunger stimulation, and hormone ghrelin (involved with energy homeostasis regulation) were lost in the turtle genome. Loss of these genes suggest this is why turtles have such low metabolism.
Genome sequencing, once again, has provided a plethora of information on the biology of a species. In this case, decoding the turtle genome has helped reveal the turtle's true ancestry, explain how the embryonic shell develops, and how the loss of genes have affected the way the turtle species tastes and processes food through a low metabolic rate. I believe it is important to look at genes from an evolutionary standpoint and to use that knowledge to explain how genes impact the survival and unique biological changes in a species.