This whole "Darwin vs. Mendel" business is strange. It bespeaks someone conceiving of scientific ideas as developed by a few Great Patriarchs. That's not how it works. In actuality scientific ideas are usually developed incrementally by a cast of thousands, and the Big Names more often than not are individuals who were in the right place at the right time to make a major synthesis.
Actually, religions don't really work like that either, most relogious ideas and texts are the product of a cast of characters...of course, those of fundamentalist mindset don't want to admit this either...