Explain why the use of blood type for paternity testing is not conclusive?

Question: Explain why the use of blood type for paternity testing is not conclusive?

Blood type analysis can be useful in paternity testing to exclude a potential father but cannot conclusively establish paternity. This is because blood types are inherited based on dominant and recessive alleles, and while a child cannot have a blood group antigen that is not present in one or both parents, many individuals can share the same blood type without being related. For instance, a man with type AB blood cannot father a child with type O blood, as he would pass on either the A or B allele. However, since blood types are not unique to individuals and many people can have the same blood type, this method cannot definitively prove who the father is. DNA testing, which examines specific genetic markers, is now the standard for conclusive paternity testing.

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