|Genetics is the study of genes and deals with the heredity, mechanism of hereditary transmission and variation in living organisms resulting from the interaction of their genes and the environment. Genetics deal beyond inheritance to studying the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism and within the context of a population. Genetics has raised to a number of sub-fields including epigenetics and population genetics. Organisms studied within the broad field span the domain of life, including bacteria, plants, animals, and humans.