genetic code

American  

noun

1. the biochemical instructions that translate the genetic information present as a linear sequence of nucleotide triplets in messenger RNA into the correct linear sequence of amino acids for the synthesis of a particular peptide chain or protein.

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genetic code British  

noun

1. biochem the order in which the nitrogenous bases of DNA are arranged in the molecule, which determines the type and amount of protein synthesized in the cell. The four bases are arranged in groups of three in a specific order, each group acting as a unit (codon), which specifies a particular amino acid See also messenger RNA transfer RNA

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genetic code Scientific  

/ jə-nĕt′ĭk /

1. The sequence of nucleotides in DNA and RNA that serve as instructions for synthesizing proteins. The genetic code is based on an “alphabet” consisting of sixty-four triplets of nucleotides called codons. The order in which codons are strung together determines the order in which the amino acids for which they code are arranged in a protein.

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genetic code Cultural  

1. The code that translates the sequence of nucleotides in genes along the DNA strand into the structure of protein, which, through its action as an enzyme, governs one chemical reaction in the cell. A simple mnemonic is “One gene codes for one protein which runs one reaction.”

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Discover More

All living things share the same genetic code, a fact that represents strong evidence for evolution. Unraveling the genetic code was one of the great scientific achievements of the twentieth century, and it opened the way to genetic engineering.

Etymology

Origin of genetic code

First recorded in 1960–65

Example Sentences

See Examples For:

genetic code

The RNA-exon editors are capable of altering parts of genetic code to repair genetic instructions that cause disease.

From The Wall Street Journal ● Jun. 3, 2026

The findings point to repeated changes in the genetic code across poorly studied microbial eukaryotes and reinforce the idea that ciliates are among the strongest exceptions to the standard genetic code.

From Science Daily ● May 7, 2026

Follow up work has strengthened the idea that ciliates are unusually rich sources of genetic code surprises.

From Science Daily ● May 7, 2026

Scientists said Crinkle had become the first of her species, which is endangered in the wild, to have her complete genetic code decoded.

From BBC ● Apr. 7, 2026

We are now on less certain ground; there may, for example, be impediments in the evolution of the genetic code, although I think this unlikely over billions of years of primeval chemistry.

From "Cosmos" by Carl Sagan