1. Variant hemoglobins (see sickle-cell anemia; hemoglobinopathy) can be used to trace past human migrations and to study genetic relationships among populations.

2. Sickle-cell anemia is one of the most prevalent hereditary disorders with prominent morbidity and mortality.

3. Examples of so-called SNP diseases are sickle-cell anemia and Huntington's disease, where a single variant or mutation has a dramatic effect.

4. Sickle-cell anemia is a blood disease that causes the cell to form a characteristic sickle-shape.

5. Many west African populations carry sickle-cell anemia allele, a genetic disorder that actually can protect against malaria.

6. This image shows two red blood cells: a normal red blood cell (colored red in the background) and a red blood cell affected by sickle-cell anemia (in the foreground).

7. Or blood cells may be examined for signs of sickle-cell anemia, leukemia, or other disorders.

8. It's long been known, for example, that gene variations that protect some Africans from malaria make them vulnerable to sickle-cell anemia.

9. More recent experiments have shown that fresh tissue derived in this manner can alleviate the symptoms of Parkinson's disease and sickle-cell anemia in mouse models.

10. In these cases it is an indication of some injury or serious disease such as leukemia or sickle-cell anemia.

11. In doing so, they paved the way for the early detection of genetic diseases such as sickle-cell anemia, and for new scientific leaps such as animal cloning.

12. You only get malaria protection. It's only when you inherit the mutation from both parents that you get sickle-cell anemia.

13. It's only when you inherit the mutation from both parents that you get sickle-cell anemia.

14. Risk factors for stroke in children include heart disease, sickle-cell anemia, some blood-clotting disorders, vascular malformations, and viral infections, such as varicella, HIV and others.

14. Wish you can benefit from our online sentence dictionary and make progress every day!

15. And you don't want that gene, Hawks says, because your offspring have a chance of having sickle-cell anemia.

16. AGE may be further evaluated as a potential therapeutic agent to ameliorate complications of sickle-cell anemia.

17. Cord blood is already being used in therapy regimens for patients with cancer, sickle-cell anemia, immunodeficiency, marrow failure and genetic diseases that call for transplants.