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One trait a plant can have is either red leaves (R) or brown leaves (r). Another trait is tall stems (T) or short stems (t). A plant used in a dihybrid cross has the genotype RrTt. What is the phenotype of this plant?
The upper-case letters generally refer to a dominant allele, meaning that if it is present in the genotype, it will be present in the phenotype. Therefore, a plant with genotype RrTt has the dominant alleles for both traits, and thus expresses these genes, giving a phenotype of a (R)ed leafed plant with (T)all stems.
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