Answer:
A specific sequence of nucleotides.
Step-by-step explanation:
DNA, which is a nucleic acid, is a molecule that is made up of nucleotides. Nucleotides have 4 types for any DNA which are A, G, C and U respectively Adenine, Guanine, Cytosine, Thymine.
The genetic code of any DNA molecule is determined solely by the specific sequence that these 4 nucleotide molecules form in the cell.
I hope this answer helps.