Question

Four babies were born on the same day in a hospital. Unfortunately, there was a mixup in the identification of which infant belonged to which couple. The ABO blood groups of both infants and parents are shown below. Which of the parental sets is the biological parents of infant 3?

1) Set A
2) Set B
3) Set C
4) Set D

Answer 1

Without specific ABO blood groups of neither infants nor prospective parents, it is impossible to determine the biological parents of infant 3 based solely on ABO blood groups.

Step-by-step explanation:

To determine which parental set is the biological parents of infant 3, we need to understand the inheritance of ABO blood groups. The ABO blood type is determined by the presence or absence of certain antigens on the surface of red blood cells. Blood type A may have a genotype of AA or AO, while blood type B may have a genotype of BB or BO. If both parents are of blood type AB, their child could have a blood type of A, B, or AB, but not O, because O is recessive.

Since the question is concerning the ABO blood group of an infant and possible parent sets, without the specific ABO blood groups of the infants and parents provided in the question, I cannot offer a direct answer in 2 lines regarding which set is the biological parents of infant 3. Nonetheless, to deduce parentage, if infant 3 had blood type O, it could only be the child of parents who both carry the recessive O allele (i.e., genotype AO, BO, or OO). Alternatively, if infant 3 had blood type AB, it would indicate that both parents must at least carry one A and one B allele between them, likely with genotypes of AA, BB, AO, or BO.