GENES

A gene can be defined as a region of DNA that controls a hereditary characteristic. It usually corresponds to a sequence used in the production of a specific protein or RNA.Genes undergo mutation when their DNA sequence changes.A gene is a basic unit in inheritance. Every gene consists of a linear sequence of bases in a nucleic acid molecule.Genes are specified by the sequence of bases in DNA in prokaryotic,archael,and eukaryotic cells,and in DNA or RNA.When proteins are manufactured, the gene is first copied into RNA as an intermediate product

In other cases, the RNA molecules are the actual functional products.The total complement of genes in an organism or cell is known as its genome which may be stored on one or more chromosomes. The region of the chromosome at which a particular gene is located is called its locus.The genetic code is the set of rules by which a gene is translated into a functional protein. Each gene consists of a specific sequence of nucleotides encoded in DNA.The vast majority of living organisms encode their genes in long strands of DNA.