Sickle cell disease in an inherited blood disorder. It is a recessive trait. That means you can carry one recessive allele for the disease and not have the symptoms. In this case, if you were a carrier and did not have the disease, your genotype for sickle cell would be

Responses
A dominant.dominant.
B heterozygous.heterozygous.
C homozygous.homozygous.
D sex-linked.