Major implications to medical field, agriculture and  conservation of biodiversity:
 
-  Sources  for pharmaceutical drugs or hormones they can look to organisms that are known  to produces the same proteins.
 
-  Help trace the transmission of disease and possible treatments, (diseases tend to  spread to similar species easier)
 
-  Ways to increase crop yields and disease resistance by cross breeding similar  organisms
 
-  Population control (introducing known predators)

- Reclassifying endangered species