alleryStart learning →Which genotype shows the sickle-cell trait but not the disease?
AHemizygous HbS
BHomozygous HbS HbS
CHomozygous HbA HbA
DHeterozygous HbA HbS
Answer & Solution
Correct answer: D. Heterozygous HbA HbS
HbA HbS people look unaffected but carry the mutant gene and can pass it on.
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