Do both parents have to have the sickle cell trait for the child to have sickle cell anemia?

Yes or Sickle cell: The sickle cell anemia is passed to a child from both parents who must have at least a single sickle gene to pass. Either parent must have trait or another hemaglobin varient that includes a sickle gene. (ss, sc, sa trait).

No: 2 abnormal (sickle cell) gene have to be inherited to have sickle cell disease. This can happen if both patents have sickle cell trait, one parent has sickle cell disease or both have sickle cell disease.

Yes: Sickle cell anemia requires the gene from both parents to cause ss anemia. If only one parent gave the gene, the kid would be a trait carrier.