Molecular Biology of the Gene

A gene is a sequence of DNA or RNA that codes for a molecule that has a unique function. During gene expression, the DNA is copied into RNA. The transmission of genes to the next generation is the basis of inheritance of phenotypic traits. The study of the structure and function of genes at the molecular level is approached from the discipline of molecular genetics, which is a branch of molecular biology. It explores the aspects of heredity, variation and mutation by studying chromosomes an...