DNA Bioscience ABO Blood Type Calculator
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Request a free DNA collection kit and see how simple the process is!
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While the DNA Bioscience ABO blood type calculator can be used to predict
possibilities of paternity, it is not a conclusive predictor for legal purposes and cannot be used as evidence at court. DNA paternity testing is the only conclusive way of determining the paternity of a child. Please visit our Legal DNA Paternity Test and DNA Paternity Test for Peace of Mind pages for more information about paternity testing.
The ABO blood type calculator is used to determine either:
- The possible ABO blood types of the child when the blood types of the
mother and father are known (top chart)
- The possible ABO blood types of the father if the blood types of the
mother and the child are known (bottom chart).
ABO blood types can be difficult to understand. This is mostly
due to the fact that the O-type antigen is masked by the presence
of an A- or B-type antigen. This is explained in the following
chart, which shows the different genotypes that make up the blood
types.
| Genotype
(DNA) |
Blood
Type |
| AO or AA |
A blood type |
| AB |
AB blood type |
| BO or BB |
B blood type |
| OO |
O blood type |
For example, two O blood type parents can only produce a child with
O blood type. Two parents with A blood type can produce a
child with either A or O blood type. Two parents with B blood
type can produce a child with either B or O blood type. One parent
with A and another with B can produce a child with A, B, AB or
O blood types. If one parent has A and another has AB, they can
produce a child with A, B, or AB blood type. If one parent
has A and another has O, they can produce a child with
A or O blood type.
Rh Positive (Rh+) and Negative (Rh-) Blood
Types
The Rh (+/-) factor is inherited separately from the ABO blood
types. Similarly to the masking effect of the O gene in ABO blood
types, the Rh negative (Rh-) gene is also masked by the presence
of an Rh positive (Rh+) genotype. Therefore, a person can have
an Rh+ blood type and still have an Rh- gene (See the chart
below) Furthermore, two parents with Rh + blood type can have
a child with Rh- blood type.
| Genotype
(DNA) |
Blood
Type |
| (+ , -) or (+ , +) |
Rh + |
| (- , -) |
Rh - |
DNA Bioscience provides this ABO blood type calculator as a free service to our visitors.
For conclusive 100% accurate results, we recommend that you:
- Order a free kit for private paternity testing, or
- Purchase a legal DNA paternity test
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