About a quarter of Aristotle's surviving writing is about biology, and some of that focusses on reproduction and heredity, particularly in his Generation of Animals, in which he describes a model of reproduction and heredity that is arguably congruent with modern understanding. To demonstrate that congruency, 12 statements from Generation of Animals are interpreted for their agreement with modem models of reproduction and heredity, followed by brief discussion of previous comments on this issue. It is concluded that, despite not assuming modem theories of genes-based heredity, Aristotle described a model that is mostly congruent with those theories.