genetics vs heredity

genetics

noun
  • The branch of biology that deals with the transmission and variation of inherited characteristics, in particular chromosomes and DNA. 

  • The genetic makeup of a specific individual or species. 

heredity

noun
  • Hereditary transmission of the physical and genetic qualities of parents to their offspring; the biological law by which living beings tend to repeat their characteristics in their descendants. 

How often have the words genetics and heredity occurred in a corpus of books? (source: Google Ngram Viewer )