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In Some Plants, a Purple Pigment Is Synthesized from a Colorless

Question 21

Multiple Choice

In some plants, a purple pigment is synthesized from a colorless precursor.In a cross between two parental plants, one purple and the other colorless, an F1 generation was produced that was all purple.The F2 produced from the F1 had 775 purple, 200 red and 65 colorless plants.What mode of inheritance and phenotypic ratio do these results suggest?


A) Incomplete dominance, 1:2:1 phenotype ratio
B) Dominant epistasis, 12:3:1 phenotype ratio
C) Codominance, 1:2:1 phenotype ratio
D) Recessive epistasis, 9:3:4 phenotype ratio

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