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  • ABO Blood Types can be used to calculate paternity?
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  • Eye colour can be used to determine paternity?
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  • Consent is required to test a person's DNA sample?
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  • DNA can be used to help solve crimes?
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DNA Diagnostics Centre ABO Blood Type Calculator

While the DNA Diagnostics Centre 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:

  1. The possible ABO blood types of the child when the blood types of the mother and father are known (top chart)
  2. The possible ABO blood types of the father if the blood types of the mother and the child are known (bottom chart).

ABO blood type calculator

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 Diagnostics Centre provides this ABO blood type calculator as a free service to our visitors. For conclusive 100% accurate results, we recommend that you:

  1. Order a free kit for private paternity testing , or

  2. Purchase a legal DNA paternity test

 

 

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