 On what grounds was this selection made? And who made it? A simple, but perhaps incomplete explanation is that the Morgan approach to genetics was selected because it was the most fruitful. A skilled geneticist who adopted the Morgan way was almost guaranteed to come up with publishable results, mostly in the form of genetic maps, and perhaps also some interesting observations such as mutations that behaved oddly in genetic crosses. By contrast, the alternative approaches that were still around in the early 20th Century did not prove to be as fruitful. That is, they did not produce a comparable number of results that could be deemed a success according to these sciences’ own standards. What is more, the alternative genetic approaches were not adaptable to other scientific disciplines such as evolutionary biology. Classical genetics thus out-competed the other approaches by its sheer productivity, which was manifested by published research papers, successful grant applications, successful students, and so on. It was therefore the scientific community as a whole that selected the new genetics due to its fruitfulness. At no point was there any weighing of evidence for or against the theoretical framework in question on the part of individual scientists, or at least this played no role (of course, there was weighing of evidence for more specific claims made within the same framework). Theories in experimental biology are thus selected as parts of experimental practices (or experimental systems, see  §4.2),  and always at the community level. This is how a social epistemological account of scientific change in experimental biology might look like (Weber 2011).