The Arctic cod is a species of fish found living in waters that reach below freezing temperatures. The fish are able to survive in subfreezing waters without their own cells freezing because they can produce an antifreeze protein that prevents the formation of ice crystals in the cytoplasm.
The DNA sequence that codes for the antifreeze protein is right next to the DNA sequence that codes for a digestive protein. A small intron sequence separates the two.
Based on this information, which of the following is MOST likely true?