People with One Sickle Cell HbS Allele and One Normal

Multiple Choice

People with one sickle cell HbS allele and one normal HbA allele are considered "carriers." What does this tell you about the dominant-recessive relationship between these two alleles?

A) The sickle cell allele is dominant.
B) The sickle cell is recessive.
C) The normal allele is dominant.
D) The normal allele is recessive.
E) Neither allele is completely dominant.