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Question: can someone please help me with this question thanks...

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Can someone please help me with this question? Thanks!

You cross two true-breeding strains of apple trees, one of which produces green apples and one produces green apples. All of the F1 plants produce red apples. When F1 plants are crossed, the F2 plants consist of 91 red apple plants and 69 green apple plants. A. Explain the results, including genotypes of parents, genotypes of F1s and the genotype/phenotype relationship in F2s. B. Describe the epistasis interactions observed. C. Assume the dominant alleles are functional enzymes recessive are non-functional. Propose a biochemical pathway that would explain this.
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