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3 June, 11:07

The inheritance of sickle cell anemia involves incomplete dominance. (S determines normal hemoglobin, it is dominant; s is the sickle cell gene). A homozygous recessive person has sickle cell anemia. A heterozygous person has the sickle cell trait. If parental genotypes are SS and ss, what is the probability of offspring having the sickle cell trait?

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  1. 3 June, 12:52
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    Answer probability of 1.

    All will be heterozygous for the traits.

    Ss Ss Ss Ss

    Explanation: the offspring will inherit one dominant gene from each of the parent with dominant allele SS and one recessive allele ss to be heterogeneous for sickle cell trait.

    Since all is Ss Ss Ss Ss, then the. factor is 4/4=1

    This follows Mendelian monohybrid inheritance rule.
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