Can two O type parents have a non-O child?
No, O type parents (genotype ii) can only pass on the O allele, so their child must be type O.
Calculator
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Results
Possible Child Blood Types
A+A-O+O-
Genetic Analysis
Inheritance patterns
Compatibility
Knowing the possible blood types helps in understanding potential donor compatibility for the child in the future.
How to Use
Step-by-step instructions
- 1Select the mother's blood type.
- 2Select the father's blood type.
- 3The calculator will show all possible blood types for their child.
ABO & Rh System
Blood type is determined by the ABO gene and the Rh factor gene. A and B are co-dominant, O is recessive. Rh+ is dominant over Rh-.
Parent 1 × Parent 2 → Offspring ProbabilitiesVariables:
A, BDominant antigensORecessive (no antigen)+/-Rhesus factorExample
O+ and A-
Inputs:
Mother:O+
Father:A-
Steps:
- 1.Mother (O+) alleles: OO, +- or ++
- 2.Father (A-) alleles: AA or AO, --
- 3.Combinations: A+, A-, O+, O-
Result:
A+, A-, O+, O-