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10 August, 15:37

The red kernel color in wheat is caused by the presence of at least one dominant allelefrom each of two independently segregating gene pairs (e. g., R-B-). Wheat plants withrrbbgenotypes have white kernels, and plants with genotypesR-bbandrrB-have yellowkernels. You cross a plant true breeding for red kernels with a plant true breeding forwhite kernels. a. What is the expected phenotype (s) and ratios of the F1plants?

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  1. 10 August, 15:45
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    100% red kernel color

    Explanation:

    R_B_ = Red kernel color

    R_bb and rrB_ = yellow kernel color

    rrbb = white kernel color

    True breeding red kernel x true breeding white kernel = RRBB x rrbb

    F1 genotype ratio = 100% RrBb

    F1 phenotype ratio = 100% red kernel color plant.

    The expected phenotype of the F1 plant is 100% red kernel color.
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