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(Solved): Blood types have been used to determine paternity in the past. A wealthy woman with blood type B R ...
Blood types have been used to determine paternity in the past. A wealthy woman with blood type B Rh- (B negative) has a baby of blood type O Rh+ (O positive). She dies under suspicious circumstances, and the baby inherits all the money. Four different men claim to be the father of the baby, and they each take a blood test, the results of which are below: Among these men, who is most likely to be the father? (Hint: Rh+ is dominant over Rh-) Man Man 4 (O-) Man
Expert Answer
In the ABO blood group system, three alleles determine the ABO blood types: A, B, and O. The A and B alleles are codominant, meaning that both alleles can express their phenotype when present in a heterozygous individual. The O allele is recessive and only expresses its phenotype when two copies are present.Individuals with the A allele produce the A antigen on their red blood cells, individuals with the B allele produce the B antigen, and individuals with the O allele do not produce either antigen. When an individual inherits an A allele from one parent and a B allele from the other parent, they will express both A and B antigens on their red blood cells, resulting in the AB blood type. This is an example of codominance, where both alleles are expressed equally.