| 21. | An individual with the sickle cell trait shows incomplete dominance when the shape of the red blood cell is considered.
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| 22. | Over the course of his high school and college careers, McGee suffered what was identified in college as sickle cell trait.
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| 23. | Presence of the sickle cell trait is evidence of survival in the presence of malaria over many centuries, suggesting differing origins.
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| 24. | The disease may range in severity from being relatively benign and like sickle cell trait to being similar to sickle cell disease.
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| 25. | The impact of sickle cell trait on malaria immunity illustrates some of the evolutionary trade-offs that have occurred because of endemic malaria.
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| 26. | About one in every 10 African-Americans has sickle cell trait, which does not cause illness but is a factor when having children.
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| 27. | In 2012, he announced the formation of Ryan Clark's Cure League to raise awareness about sickle cell trait and eventually find a cure.
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| 28. | The average life span of a person with just the sickle cell trait is normal, 72 years for males and 78 for females.
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| 29. | Clark has a sickle cell trait condition which made it dangerous for him to play at high altitudes, such as in Denver, Colorado.
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| 30. | Devaughn died not because he had a sickle cell trait, but because these people did not allow him and the athletes to have water.
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