Context: In a group of rock pocket mice, some individuals have dark fur and others have light fur. In this group, the gene for the fur color trait has two alleles. The allele for light fur (f) is recessive to the allele for dark fur (F).
Cleo is a rock pocket mouse from this group. Cleo has the homozygous genotype ff for the fur color gene.
Based on this information, what is Cleo's phenotype for the fur color trait?
A. light fur
B. dark fur
Answer with the option's letter from the given choices directly.
Answer: A