A tall, green plant with dominant alleles for both characteristics have a genotype TTGG and its phenotype is tall and green.
Explanation:
For a given trait, the dominant allele of the allelic pair is represented in capital letters (T and G), while the recessive allele is represented in small letters (t and g).
In the case of this plant, whose phenotype is tall and green —both dominant characteristics— and considered pure because both alleles are dominant, the genotype is TTGG.
<em>In the case of a hybrid, the phenotype would be the same but the genotype would be TtGg.
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