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Question: 11 two whiteflowered strains of the sweet pea lathyrus odoratus...

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11.

Two white-flowered strains of the sweet pea (Lathyrus odoratus) were crossed producing an F1 with only purple flowers. Random crossings among the F1 produced 97 progeny plants: 54 with purple flowers and 43 with white flowers.

a) What is the phenotypic ratio of the F2 generation?

b) What are the probable genotypes of the parental generation?

c) How would you explain biochemically the relationship between purple and white flowers?

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