There is only one possible sequence of amino acids when deduced from a given nucleotides. But multiple nucleotide sequences can be deduced from a single amino acid sequence. Explain this phenomenon.

Explanation

Some amino acids are coded by more than one codon (known as degeneracy of codons), hence on deducing a nucleotide sequence from an amino acid sequence, multiple nucleotide sequence will be obtained. For e.g., Ile has three codons: AUU, AUC AUA hence a dipeptide Met-Ile can have the following nucleotide sequence :
(i) AUG - AUU
(ii) AUG - AUC
(iii) AUG - AUA
If we deduce amino acid sequence for the above nucleotide sequences, all the three will code for
Met-Iie