 The debate over the relationship between classical genetics and molecular genetics didn’t so much resolve itself as it did evolve into a series of new philosophical questions. That is, as philosophers were working through the details of genetics to assess the relationship between the older version and the newer one, they encountered a series of questions that demanded consideration: What exactly is a “gene”? And what do genes actually do? Philosophers continued to consider the reduction question (for examples of subsequent defenders of reduction, see Waters 1990; Schaffner 1993). But these other questions took on a life of their own and became legitimate targets of inquiry independent of the reduction debate. Philosophy of biology professionally emerged as a unique sub-discipline of philosophy of science in the 1970s and 1980s as this unfolded (entry:  philosophy of biology).  