Which statement concerning the sickle-cell trait is true?
A) Individuals with the trait have the dominant phenotype but possess the recessive genotype.
B) Individuals with the trait have both a dominant and recessive allele for the disorder.
C) Individuals with the trait are genetically predisposed to the disorder but cannot display any symptoms.
D) Individuals with the trait tend to have the most severe form of the disease.

Question

Quizplus · Accepted Answer

Individuals with the sickle-cell trait have one normal allele and one allele for sickle-cell disease, making them carriers (heterozygous) for the disorder. This means they have both a dominant (normal) and a recessive (sickle-cell) allele.

Which Statement Concerning the Sickle-Cell Trait Is True