Gene is a unit of genetic material composed of a sequence of nucleotides that provides a specific function to an organism. It regulates all the activities and attributes of an organism. They are found in the chromosomes in their specific loci and their main component is DNA.
The modern names of gene are:
1. Recon: The smallest unit of DNA made of a pair of nucleotides.
2. Muton: The smallest mutable unit of DNA.
3. Cistron: The functional unit of DNA, responsible for synthesis of one polypeptide chain.
4. Codon: Portion of DNA made of 3 nucleotides that specifies one amino acid.