Based on this information, what is Winnee's phenotype for the wool color trait?

 - white wool
 - black wool
Winnee's genotype for the wool color gene is ll. Winnee's genotype of ll has only l alleles. The l allele is for black wool. So, Winnee's phenotype for the wool color trait must be black wool.
To check this answer, consider whether Winnee's alleles are dominant or recessive. The allele for black wool (l) is recessive to the allele for white wool (L). This means L is a dominant allele, and l is a recessive allele.
Winnee's genotype of ll has only recessive alleles. An organism with only recessive alleles for a gene will have the recessive allele's version of the trait. So, Winnee's phenotype for the wool color trait must be black wool.