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In maize, the trait for the purple kerne...

In maize, the trait for the purple kernel (P) is dominant over the yellow kernel (p). A plant with purple kernels is crossed with another plant with yellow kernels and produces 2 offspring with purple kernels and 2 offspring with yellow kernels.
(c) Describe a method that can definitely help with the identification of an unknown genotype of a plant with purple kernels.

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