Question

the pedigree reflects the inheritance of the autosomal dominant alleles involved in determining human blood type. those individuals inheriting a dominant allele are considered to be affected. if one parent has blood type a, and the other parent has blood type b, what blood type will the offspring denoted by the white square and white circle have? type a type b type ab type o

Explanation:

In human blood - type inheritance, if one parent has blood type A (genotype \(I^A I^A\) or \(I^A i\)) and the other has blood type B (\(I^B I^B\) or \(I^B i\)), for the offspring to be unaffected (in the context of the autosomal - dominant allele for blood type, assuming the recessive allele is \(i\)). The only way for an offspring to be unaffected (in terms of the non - dominant blood type) is when both parents contribute the recessive \(i\) allele. When \(I^A i\times I^B i\), using the Punnett square:

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The \(ii\) genotype corresponds to blood type O.

Answer:

type O