In Drosophila, a gene for white eye mutation is also responsible for the depigmentation of body parts. Thus a gene represents

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Single gene affecting the different characters which may be physiologically unrelated. Pleiotropic gene has a multiple phenotypic effect because it can control expression of a number of characters. White eye mutation in drosophila, result in depigmentation in many other parts of the body giving a pleiotropic effect.

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