Patentatibility of genetic code. Should genetic researchers be able to obtain patents on “raw” genetic code? What should the Patent and Trademark Office’s policy be on demonstrating “utility” in order to obtain a patent for a snippet of DNA?

Patentatibility of genetic code. Should genetic researchers be able to obtain patents on “raw” genetic code? What should the Patent and Trademark Office’s policy be on demonstrating “utility” in order to obtain a patent for a snippet of DNA?