Why Cats Can't Taste Sweetness
The Tas1r2 Gene Mutation
Normal Tas1r2 Gene
Exon 1
Exon 2
Exon 3
Exon 4
Exon 6
→ Functional Sweet Taste Receptor
Cat Tas1r2 Gene
→ No Sweet Taste Receptor
This mutation turns Tas1r2 into a pseudogene, rendering cats unable to detect sweet tastes.