Can you prove paternity based on blood type?
Similarly one may ask, can you tell blood type from DNA?
Using Blood-Typing in Paternity Tests The process of DNA fingerprinting was developed by Alec Jeffreys in 1984, and it first became available for paternity testing in 1988. Thus, if a person's ABO blood type is O, he or she has two O alleles.
Subsequently, question is, do Babies always have the father's blood type? No it doesn't. Neither of your parents has to have the same blood type as you. For example if one of your parents was AB+ and the other was O+, they could only have A and B kids. In other words, most likely none of their kids would share either parent's blood type.
Considering this, can a child have a different blood type than both parents?
While a child could have the same blood type as one of his/her parents, it doesn't always happen that way. For example, parents with AB and O blood types can either have children with blood type A or blood type B. These two types are definitely different than parents' blood types! They will match both parents.
How do you determine someone's blood type?
The test to determine your blood group is called ABO typing. Your blood sample is mixed with antibodies against type A and B blood. Then, the sample is checked to see whether or not the blood cells stick together. If blood cells stick together, it means the blood reacted with one of the antibodies.