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Blood Type Calculator |
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Blood types are passed on from parents to child following a predictable pattern of inheritance. The Genesys Blood Type Calculators can be used to predict the following:
- A child’s possible blood types based on the parents’ blood types
- A father’s possible blood types based on the blood type of the child and the mother
These calculators limit the possible blood types for the child or father to a few possibilities, but it cannot conclusively determine paternity. For more information, please visit the History of Paternity Testing page.
Child’s Blood Type Calculator
To determine a child’s possible blood types, find the mother’s blood type on the first column and the father’s blood type on the first row. Then find the table cell where the two blood types meet. The blood types in that cell are the child’s possible blood types.
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Father's Blood Type |
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A
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B
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AB
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O |
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Mother's Blood Type
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A
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A or O
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A, B, AB, or O
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A, B, or AB
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A or O |
Child's Blood Type |
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B
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A, B, AB, or O
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B or O
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A, B, or AB
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B or O |
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AB
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A, B, or AB
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A, B, or AB
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A, B, or AB
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A or B |
O |
A or O |
B or O |
A or B |
O |
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Father’s Blood Type Calculator
To determine a father’s possible blood types, find the mother’s blood type on the first column and the child’s blood type on the first row. Then find the table cell where the two blood types meet. The blood types in that cell are the father’s possible blood types.
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Child's Blood Type
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A
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B
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AB
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O
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Mother's Blood Type
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A
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A, B, AB, or O
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B or AB
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B or AB
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A, B, or O
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Father's Blood Type
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B
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A or AB
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A, B, AB, or O
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A or AB
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A, B, or O
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AB
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A, B, AB, or O
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A, B, AB, or O
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A, B, or AB
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O
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A or AB
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B or AB
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A, B, or O
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Certified Quality Testing 
