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Question: you have 2 true breeding strains of a plant both...

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You have 2 true breeding strains of a plant. Both strains have white flowers. Wild-type

flower color in this species is red. When strain #1 was crossed to wild-type plants, the F1 plants

had red flowers. When strain #2 was crossed to wild-type plants, the F1 plants had red flowers.

When the two white flowered mutants were crossed together, the F1 plants had red flowers.

When the F1 plants from crossing the two mutants are self-fertilized, the following F2 progeny were obtained:

F2 phenotypes #

Red flowers 15

White flowers 185

Propose a hypothesis to explain the inheritance of flower color in these plants. Clearly describe how

many genes are involved, the dominance relationships of alleles, and any interactions that may be

occurring between genes. Diagram out the crosses, assigning genotypes and phenotypes to the parental,

F1, and F2 plants.

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