Jolie Has Sickle-Cell Trait, a Temporary, Relatively Mild Form of Sickle-Cell

question 43

Multiple Choice

Jolie has sickle-cell trait, a temporary, relatively mild form of sickle-cell anemia, but does not have full-blown sickle-cell anemia. Her condition is most likely the result of

• A) incomplete dominance between one allele for normal blood cells and one for sickle-shaped cells.
• B) two recessive alleles for sickle-shaped cells.
• C) a dominant sickle-shaped cell allele and a recessive normal blood cell allele.
• D) two dominant alleles for normal blood cells.

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