<P> Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century , but modern genetics has expanded 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 ( e.g. dominance ) , and within the context of a population . Genetics has given rise to a number of subfields , including epigenetics and population genetics . Organisms studied within the broad field span the domains of life ( archaea , bacteria , and eukarya ) . </P>
<P> Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century , but modern genetics has expanded 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 ( e.g. dominance ) , and within the context of a population . Genetics has given rise to a number of subfields , including epigenetics and population genetics . Organisms studied within the broad field span the domains of life ( archaea , bacteria , and eukarya ) . </P>
name the branch of science that deals with the study of heredity and variation
name the branch of science that deals with the study of heredity and variation
genetics
genetics