Life is specified by genomes. Every organism, including people, has a genome that comprises all the biological info wanted to build and maintain a living example of that organism. The biological info contained in a genome is encoded in its deoxyribonucleic acid (DNA) and is divided into discrete items referred to as genes( Genes code for proteins and these codes are hooked up to the genome at the suitable positions, which change on a series of reactions known as gene expression. It is encoded either in DNA or, for a lot of varieties of virus, in RNA. The genome consists of each the genes and the non-coding sequences of the DNA/RNA). A sequence is an absolute measure of base composition of a person, or a representative of a species or group; a genotype typically implies a measurement of how a person differs or is specialized inside a group of people or a species. So usually, one refers to an individual’s genotype with regard to a selected gene of interest and, in polyploid individuals, it refers to what combination of alleles the individual carries (see homozygous, heterozygous). The genetic structure of an organism is referred to as its genotype, such because the letters Bb. (B - dominant genotype and b - recessive genotype).