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Blue-eyed Mary is a small wildflower whose petals may have one of three colors: blue, pink,...

Blue-eyed Mary is a small wildflower whose petals may have one of three colors: blue, pink, or white. Petal color is determined by the action of two independently assorting gene loci:


  • Deposit pigment (D/d)

    • D (fully dominant) = deposit pigment in petals
    • d (fully recessive) = do not deposit pigment in petals; petals are white

  • Blue pigment (B/b)

    • B (fully dominant) = pigment deposited in petals is blue

    • b (fully recessive) = pigment deposited in petals is pink


A (3). A plant breeder crosses blue-eyed Mary plants with white flowers with other ones that have pink flowers.  All of the many F1 offspring of this cross have blue flowers. What were the genotypes of the white and pink parents? Please show your work.











B (3). The breeder then crosses two of the blue-flowered F1 offspring from part A. What are the proportions of blue-, pink-, and white-flowered blue-eyed Mary plants that we should expect to see among the F2 offspring of this cross? Please show your work.


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