Final answer:
Sickle-cell is not a racial trait. It is an autosomal recessive disorder caused by a genetic mutation in the beta-globin gene. It can affect individuals from various racial backgrounds.
Step-by-step explanation:
The statement "Sickle-cell is not a racial trait" means that sickle cell anemia is not determined by race. It is an autosomal recessive disorder caused by a genetic mutation in the beta-globin gene. This means that anyone, regardless of their race, can inherit the gene for sickle cell anemia.
For example, sickle cell anemia is more prevalent in people of African descent, but it can also occur in people of Mediterranean, Middle Eastern, and Indian origin.
Therefore, sickle cell is not a racial trait but rather a genetic disorder that can affect individuals from various racial backgrounds.