Fraction of Type II SNe, assuming a realistic population in which 50% of systems are binaries, that are expected to arise from stellar progenitors that have lived their lives as effectively single stars (white) and progenitors that have interacted with a binary companion through gaining mass or merging. See Sect. 2 for an overview of each evolutionary path. The main values correspond to the simulation with our standard assumptions whereas ranges in parenthesis refer to the upper and lower limits found in our parameter variations, excluding variations in binary fraction.