| a triplet of adjacent nucleotides in the messenger RNA chain that codes for a specific amino acid in the synthesis of a protein molecule. |
| the final stage of meiosis or mitosis, in which the separated chromosomes reach the opposite poles of the dividing cell and the nuclei of the daughter cells form around the two sets of chromosomes. |
mutagen mu·ta·gen (my&oomacr;'tə-jən, -jěn')
n.
An agent, such as ultraviolet light or a radioactive element, that can induce or increase the frequency of mutation in an organism.