Genes are the units of heredity. A gene is a segment or section of a DNA molecule. This segment of DNA provides a genetic code for the synthesis of proteins. The nucleic acid language of the gene is written as a sequence of bases on the DNA molecule. Such a sequence might read G- C- T- T- A- C- C- G- A- T- T. . . . This is the molecular “language” that will ultimately specify an amino acid sequence in a protein.
