Hereditary information which must be carried on to offsprings is stuffed in the core of the cell i.e. nucleus. It contains the hereditary material of the cell as chromosomes. A chromosome is a structure of DNA and protein found in cells. Chromosome is a solitary bit of coiled DNA containing genes. Chromosomes are thought to be the vehicles of heredity as they convey genes. Genes control characteristics. Proteins formed from RNA are in charge of the traits. These traits can be expressed as phenotype {appearance} or genotypes {genetic make-up}.

The central dogma of life.