Blood Group Genetics & Antigens

Offspring phenotype inheritance probabilities and multi-antigen negative donor screening calculators.

Mendelian Offspring Inheritance Calculator

Select maternal and paternal genotypes to generate expected blood group distributions.

Maternal ABO Genotype

Paternal ABO Genotype

Maternal RhD Genotype

Paternal RhD Genotype

ABO Offspring Probabilities

Blood Group AB:25%

Blood Group A:25%

Blood Group B:25%

Blood Group O:25%

RhD Offspring Probabilities

RhD Positive:50%

RhD Negative:50%

Multi-Antigen Negative Screening Estimator

Select the red cell antigens the recipient has antibodies against (antigens that must be negative in donor units):

Compatible Units Needed

Combined Compatibility

100.0%

Approx. Units to Screen

2 unit(s)

Formula: Units to Screen = Required Units / ∏ (1 - Antigen Frequency)

Disclaimer: This toolkit is intended to support trained laboratory professionals. It provides calculation and decision-support functions and should be used in conjunction with local SOPs, validated laboratory procedures and current national guidelines. Final clinical interpretation remains the responsibility of the reporting laboratory.