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Epistasis: Fruit Color in Summer Squash

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White fruit color in summer squash is dependent on dominant allele W and colored fruit on recessive allele w. In the presence of ww and a dominant gene G, the color of the fruit is yellow. When G is absent, i.e., when it's gg, then the color is green. What F2 phenotypes and proportions are expected when a white fruit WWGG is crossed with a green fruit wwgg?

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This solution discusses what F2 phenotypes and proportions are expected when a white fruit WWGG is crossed with a green fruit wwgg.

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