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Two people who are both blood type A met at a support group for siblings of...

Two people who are both blood type A met at a support group for siblings of people with phenylketonuria (PKU). (PKU is an autosomal recessive disease.) This couple had a son who does not have PKU, but who has type O blood. What is the probability that their next child will be a daughter who does not have PKU and has type A blood? (Draw the pedigree with genotypes included)

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Answer #1

The sibling of parents have phenylketinuria. It means the couple are heterozygous for this gene.

The couple has child with O blood groupm it means they have iAi conditions.

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