As cat owners know, their feline friend would much rather chase and eat a live mouse than snack on the chocolate equivalent, and now researchers have discovered the reason – cats are simply unable to taste sweet things. An examination of feline genetics has shown a significant defect in one of the genes that codes for part of the sweet taste receptor. This “huge deletion” of 247 base pairs in the gene that codes for the T1R2 protein – one of two proteins that make up the sweet taste receptor in mammals – has left cats unable to detect sweet-tasting...