Genetical Research5,282–304 (1964). Section1, pp.284–286, especially Fig.1p.285, routes4a/4b and outside-marker outcomes. Primary PDF www.cambridge.org/core/services/aop-cambridge-core/content/view/E11586A6605C2A54C648BACEABECF954/S0016672300001233a.pdf/a-mechanism-for-gene-conversion-in-fungi.pdf . Historical model, not a universal modern biochemical pathway.