Blood Type Inheritance Calculator

Parent Blood Group Estimator

Input Fields

Child Blood Type

ABABO

Child Rh Factor

+-

One Parent Blood Type

ABABO

One Parent Rh Factor

+-

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Calculate automaticallyIf enabled, the result will update automatically when you change any value.

Your Results

Other Parent Blood Type

Other Parent Rh Factor

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Blood Type Inheritance Logic

$$\text{Child’s blood type} = \text{Combination of parental alleles from ABO and Rh systems}$$

ABO System Genotypes:

• A: AA or AO
• B: BB or BO
• AB: AB
• O: OO

Rh System:

• Rh⁺: ++ or +−
• Rh⁻: −−

Based on these combinations, the calculator checks all possible parental genotypes that could result in the selected child’s blood group.

Blood type is determined by the ABO and Rh gene systems. This calculator uses the child’s blood group to predict potential blood types of the parents by analyzing all genetically valid allele combinations. It’s useful for educational purposes, biology studies, or simple curiosity about how traits are inherited. While it shows possible combinations, it cannot determine exact blood types of parents without more information.