genetics vs parentage

genetics

noun
  • The genetic makeup of a specific individual or species. 

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

parentage

noun
  • The identity and nature of one's parents, and in particular, the legitimacy of one's birth. 

  • The social quality of one's class in society. 

  • Origin; derivation. 

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