Reproduction sits in the official PMDC Biology curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.
Biology carries 81 of the 180 questions in the real paper - 45% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 81questions are split across chapters, so no honest page can tell you “expect four from Reproduction”. What the archive can tell you is what actually appeared: 1 Reproduction question out of the 77 Biology questions digitised so far.
That is a thin sample, and it is worth saying so plainly rather than dressing it up: with this few questions, the count tells you very little about how heavily Reproduction is examined. It grows as the remaining papers are digitised.