Sickle Cell, Malaria and Natural Selection

Front

The sickle-shaped cells can also stick to vessel walls, causing a blockage that slows or stops the flow of blood. When this happens, oxygen can't reach nearby tissues. The lack of oxygen can cause ______.

Back

Episodes of Pain

Front

Hemoglobin is a protein in ________ that carries oxygen throughout the body.

Back

Red Blood Cells

Front

If you have SCD, there is a problem with your ______. It is a protein in red blood cells that carries oxygen throughout the body.

Back

Hemoglobin

Front

With SCD, the hemoglobin forms into stiff rods within the red blood cells. This changes the shape of the red blood cells to ___________.

Back

crescent-shaped

Front

The sickle-shaped cells can also ______ vessel walls, causing a blockage that slows or stops the flow of blood. When this happens, _____ can't reach nearby tissues.

Back

stick to, oxygen

Front

Individuals with SCD have ___ copies of a mutated gene.

Back

2

Front

Who is at risk for sickle cell disease?

Back

African Americans

Front

Which genotype represents a sickle cell carrier?

Back

AS

Front

Which genotype represents a patient that suffers from sickle cell disease, if A represents the normal allele? Options: SS, AS, AA, SA

Back

SS

Front

How many copies of the sickle cell gene are needed for a person to have the disorder?

Back

2