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(B) Sickle-cell anaemia is an autosome-linked recessive trait. Individuals with the genotype $Hb^{A}Hb^{A}$ are normal. Individuals with the genotype

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Heterozygous individuals exhibit sickle-cell trait.

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(B) Sickle-cell anaemia is an autosome-linked recessive trait. Individuals with the genotype $Hb^{A}Hb^{A}$ are normal. Individuals with the genotype $Hb^{A}Hb^{S}$ are carriers and exhibit the sickle-cell trait,meaning they are generally healthy but can pass the gene to their offspring. Individuals with the genotype $Hb^{S}Hb^{S}$ are affected by the disease. Therefore,the correct statement is that heterozygous individuals $(Hb^{A}Hb^{S})$ exhibit the sickle-cell trait.

Mark the correct statement with respect to sickle-cell anaemia.

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