Context: In a group of rose plants, some individuals have light yellow flowers and others have dark yellow flowers. In this group, the gene for the flower color trait has two alleles. The allele for light yellow flowers (F) is dominant over the allele for dark yellow flowers (f).
A certain rose plant from this group has the homozygous genotype FF for the flower color gene.
Based on this information, what is this plant's phenotype for the flower color trait?
A. dark yellow flowers
B. light yellow flowers
Determine the correct option from the provided choices and reply with its corresponding letter.

B