After having asked this question about the connectivity between clonal cortical neurons, I'd like to know: Do corresponding areas in the two hemispheres arise from the same stem cells, such that these areas connect to each other more strongly than to others?

That is, were the various wavelengths of light that we and other animals can perceive assigned random color values by the brain at various points during our evolution? Edit: By "color value", I'm referring to the specific color/hue that a wavelength of light is perceived as by the eyes/brain. Ce...