Answer:
in the mutated snapdragon plants, the green leaves started becoming yellow. this conditioned plant is known as, aurea, which has less chlorophyll than green plants.
Crosses had done between various combinations of green and aurea plants and the result was- green x green = all green
aurea x aurea = 2/3 aurea, 1/3 green
green x aurea = 1/2 green, 1/2 aurea
here, the green allele is G, and the aurea allele is GA,
according to the question, in the cross of plants,
the green plants produced all green but some of the crosses of aurea phenotype also gave the green phenotype.
so it can be concluded that the green phenotype (the wild type) came from the recessive allele. No instances of incomplete dominance or codominance were shown.
Thus, the following genotypes would have their phenotypes, as follows:
GG - green
GAGA - aurea
GGA - aurea