Genetics is the branch of biology dealing with study of heredity, which studies the way in which genes operate and the way in which they are transmitted from parent to offspring. Genetics can be subdivided into a number of more specialized subjects including classical genetics (which deals with the inheritance of parental features in higher animals and plants), cytogenetics (which deals with the cellular basis of genetics), microbial genetics (which deals with inheritance in microorganisms), molecular genetics (which deals with the biochemical basis of inheritance), and human genetics (which deals with inheritance of features of social and medical and importance in man). See also genetic counseling.