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Because the condition causes the red blood cells to become sickle shaped rather than round.
Sickle cells. Sickle cell anemia is the disease characterized by sickle-shaped blood cells.
Sickle-cell anemia.
Crescent.
Spherocytosis
The word is falcate. It means curved like a sickle.
C. Sickle-cell anemia
Sickle-cell anemia
Sickle cell disease is caused when someone inherits sickle shaped hemoglobin. It is a disease that can be managed, but not cured.
C. Sickle-cell anemia
Sickle cell is common in people from tropical areas where malaria is prevalent. Malaria can not survive on blood cells that are sickle shaped, so when populations were being killed off by malaria, those with sickle cell were surviving and passing on the sickle cell gene.
The amino acid sequence of the sickle cell allele for hemoglobin varies from the normal allele for hemoglobin by one amino acid. The sickle cell allele for hemoglobin has valine instead of glutamic acid. When the oxygen level of the blood decreases, the hemoglobin molecules come out of solution, stick together, and form long chains that cause the red blood cells to become sickle shaped.