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?

Question

Biology

Haiden Ramsey

23 September, 20:36

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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Cecelia Waller · Answer 1

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.