What phrase describes the ordering of nucleotides in DNA that carry genetic information?

The correct choice for describing the ordering of nucleotides in DNA that carry genetic information is "Genetic code." This phrase refers specifically to the way in which sequences of nucleotides in DNA correspond to specific amino acids or signify functional control in biological systems. The genetic code is essential for the process of translating the information encoded in DNA into proteins, which ultimately determines the traits and functions of an organism.

While "nucleotide sequence" could seem related, it emphasizes the specific arrangement of nucleotides rather than the functional meaning these arrangements convey within the broader context of genetic information. "Genetic sequence" is a general term that can refer to any sequence of nucleotides, and "gene expression" pertains to the process by which information from a gene is utilized to synthesize a functional product, such as a protein. Therefore, "genetic code" stands out as the best description of how nucleotide order conveys genetic information.