The phenotype of tomato plants (Solanum lycopersicum) is influenced by their genetic makeup.
Stem colour in these plants is controlled by a single gene. The allele for a purple stem (AAA) is dominant, while the allele for a green stem (aaa) is recessive.
A grower crossed a green-stemmed plant with a purple-stemmed plant. The resulting offspring consisted of 47 green-stemmed plants and 51 purple-stemmed plants.
State the genotype of the purple-stemmed parent plant.
