Can an amino acid have more than one possible codon?

Yes, an amino acid can have more than one possible codon due to the redundancy in the genetic code, also known as codon degeneracy. For example, the amino acid leucine can be encoded by six different codons (UUA, UUG, CUU, CUC, CUA, CUG). This redundancy helps to minimize the impact of mutations and ensures that protein synthesis can occur even with some variations in the DNA sequence.