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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 require 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

The DNA Diagnostics Centre ABO blood type calculator can be as a guideline for possibilities of paternity, its important to add that it is not a conclusive predictor for legal purposes and cannot be used in a court of law. DNA paternity testing is the only decisive way of establishing the paternity of a child. View our Legal DNA Paternity Test and DNA Paternity Test for Peace of Mind pages for further information about paternity testing.

The ABO blood type calculator can be used to establish either:

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

ABO blood type calculator

ABO blood types can be complicated to comprehend. This is mainly due to the fact that the O-type antigen is masked by the presence of an A- or B-type antigen. This is detailed in the following information box, which shows the different genotypes that formulate 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 create a child with O blood type. Two parents with A blood type can create a child with either A or O blood type. Two parents with B blood type can create a child with either B or O blood type. One parent with A and the other with B can create a child with A, B, AB or O blood types. If one parent has A and another has AB, they can create a child with A, B, or AB blood type. If one parent has A and another has O, they can create a child with A or O blood type.

Rh Positive (Rh+) and Negative (Rh-) Blood Types

The Rh (+/-) factor is inherited independently from the ABO blood types. In the same way to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the existence of an Rh positive (Rh+) genotype. Therefore, a person can have an Rh+ blood type and still have an Rh- gene (See the box underneath) 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 presents this ABO blood type calculator as a complimentary service to our clients. For conclusive 100% accurate results, we advise that you:

  1. 1. Purchase a private paternity testing , or

  2. 2. Discuss a legal DNA paternity test

 

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