Based on this information, what is Shiloh's phenotype for the fur length trait?

 - short fur
 - long fur
Shiloh's genotype for the fur length gene is ff. Shiloh's genotype of ff has only f alleles. The f allele is for long fur. So, Shiloh's phenotype for the fur length trait must be long fur.
To check this answer, consider whether Shiloh's alleles are dominant or recessive. The allele for long fur (f) is recessive to the allele for short fur (F). This means F is a dominant allele, and f is a recessive allele.
Shiloh's genotype of ff has only recessive alleles. An organism with only recessive alleles for a gene will have the recessive allele's version of the trait. So, Shiloh's phenotype for the fur length trait must be long fur.