OpenStudy (anonymous):
help plz Which of the following is a blood disorder characterized by crescent-shaped, red blood cells and is caused by a recessive allele that produces an alternate form of hemoglobin? A. Huntington disease B. Sickle cell anemia C. Tay-Sachs D. Malaria
OpenStudy (anonymous):
B I think
OpenStudy (anonymous):
TommyTrojan is right. Take a look at this picture: http://learn.genetics.utah.edu/content/disorders/whataregd/sicklecell/images/sicklecell.jpg It shows us a side-by-side comparison of normal red blood cells, and the crescent-shaped blood cells of someone who has sickle cell anemia. The hemoglobin in the sickle shaped blood cells is different from what it should be. It's very stiff, which makes it easy for the blood cells to get stuck in our blood vessels. It's also a very painful genetic disorder.
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