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They are in the shape of a sickle. A sickle is a hand held curved blade, sharp on the inside edge, used for cutting crops. (See hammer and Sickle in the old USSR flag).

Why they are in the shape of the sickle, is probably due to their chemical makeup and crystal structure.

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What are the different types of sickle cell disease and how do they differ from each other?

There are several types of sickle cell disease, including sickle cell anemia, sickle beta thalassemia, and sickle cell-hemoglobin C disease. These types differ based on the specific genetic mutations that affect the hemoglobin protein in red blood cells. Sickle cell anemia is the most common and severe form, where individuals have two copies of the sickle cell gene. Sickle beta thalassemia and sickle cell-hemoglobin C disease are milder forms that result from different combinations of genetic mutations. Symptoms and complications can vary among the different types of sickle cell disease.


How is sickle cell trait different from sickle cell disease and what are the key distinctions between the two conditions?

Sickle cell trait and sickle cell disease are both genetic conditions caused by a mutation in the hemoglobin gene. Sickle cell trait means a person carries one copy of the mutated gene, while sickle cell disease means a person has two copies. The key distinction is that individuals with sickle cell trait usually do not experience symptoms, while those with sickle cell disease can have severe health issues such as pain crises, anemia, and organ damage.


What is an inherited autosomal recessive disorder of the blood where an individuals red blood cells are sickle shaped rather than disk shaped?

C. Sickle-cell anemia


Why do sickle cells change shape and become "sickled" in individuals with sickle cell disease?

Sickle cells change shape and become "sickled" in individuals with sickle cell disease due to a genetic mutation that causes the hemoglobin in red blood cells to form long, rigid structures under certain conditions, leading to the characteristic sickle shape.


Is sickle cell an example of codominance in genetics?

Yes, sickle cell anemia is an example of codominance in genetics.