Answer:Pair of genes
Step-by-step explanation:
The trait of the plant can be determined by the the pair of genes that is transferred from the parents to the offspring.
The genes that is carried from the parents has both the pair of genes. The dominant genes that is expressed in the generation is known as dominant gene. It is dominant over other gene.
The gene which is not expressed is known as recessive gene.Hence, the correct answer is option C.