Would the parent be heterozygous or homozygous if a recessive plant was crossed...

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...w.it & produced this offspring? In corn, kernel color is due to the autosomal dominant allel R. Homozygous recessive r alleles produce colorless kernels. The color of the whole plant is controlled by the autosomal allele Y, giving the plant a green color, but producing yellow plants (y) if homozygous recessive. A testcross with a plant of unknown genotype with a plant that was rr yy produced the following:
colored Green kernel - 12
colored Yellow kernel - 88
colorless Green Kernel - 92
colorless yellow kernel - 8
Which of the following would be true of the unknown phenotype?
It is a heterozygote, and the alleles are arranged in a repulsion linkage phase.
The unknown plant is homozygous dominant and the alleles are arranged in a coupling linkage phase
The unknown plant is a heterozygote and the alleles are arranged in a coupling linkage phas
The unknown plant is homozygous dominant and the alleles are arranged in a repulsion linkage phase.