UC Berkeley research has shown that each of the two strains of the fungus Neurospora crassa, which in this video are the green-stained strain and the red-stained strain, only fuse with their own kind. Although they may touch each other, they do not become one, unless they are of the same strain. In this video, black arrows point to meetings between two different strains, and the yellow arrows point to the fusing of two like strains. (N. Louise Glass video).
