Context: In a group of cats, some individuals have straight fur and others have curly fur. In this group, the gene for the fur type trait has two alleles. The allele for curly fur (f) is recessive to the allele for straight fur (F).
Millie is a cat from this group. Millie has the homozygous genotype ff for the fur type gene.
Based on this information, what is Millie's phenotype for the fur type trait?
A. straight fur
B. curly fur
Answer with the option's letter from the given choices directly.

B