MyMapABO Blood Type Punnett Square
A Punnett square showing ABO blood type inheritance from an IAi x IBi cross — with genotypes, phenotypes, and codominance annotations for all four possible offspring.
Preview
“Create a Punnett square for ABO blood type inheritance (IAi x IBi cross)”
About the framework
Applying Punnett Squares to ABO Blood Type Genetics
This template applies the Punnett square framework to one of the most practical genetics topics students encounter: ABO blood type inheritance. Unlike simple Mendelian dominance, ABO inheritance involves codominance (IA and IB are codominant) and multiple alleles (three alleles: IA, IB, and i), making it an excellent teaching tool for intermediate genetics concepts.
The 2x2 grid crosses a heterozygous Type A parent (IAi) with a heterozygous Type B parent (IBi). The four resulting genotypes — IAIB, IAi, IBi, and ii — produce all four ABO phenotypes: Type AB, Type A, Type B, and Type O. Each cell is annotated with the dominance relationship that produces its phenotype, reinforcing how codominance and recessiveness work in a single diagram.
Use this template for genetics homework, exam prep, or classroom demonstrations. The AI can change the parental genotypes — for example, IAi x IAi for a Type A x Type A cross — or add Rh factor for a more complete blood typing analysis. Students can also explore what happens in crosses involving homozygous parents to see how offspring ratios change.
What's included
What you get
- 2x2 grid layout with parent alleles as row and column headers
- IAIB (Type AB): codominant expression of both antigens
- IAi (Type A) and IBi (Type B): dominant allele outcomes
- ii (Type O): homozygous recessive with no antigens
- Color-coded cells by blood type for quick identification
ABO Blood Type Punnett Square
Frequently asked questions
Common questions
Can I change the parent genotypes to a different cross?
Yes. Tell the AI the cross you need: 'Change to IAIA x IBi' or 'Show a Type O x Type AB cross.' It will regenerate the grid with the correct genotypes and phenotype ratios for your specific parental combination.
How do I add Rh factor to this Punnett square?
Ask the AI: 'Expand this to include Rh factor with parents IAi Rr x IBi Rr.' This creates a more complex grid showing both ABO type and Rh positive/negative combinations — useful for understanding blood compatibility.
Can I use this for a genetics exam study guide?
Absolutely. The color-coded layout makes it easy to memorize genotype-phenotype relationships. You can ask the AI to generate multiple crosses side by side for comparison, or add a summary of phenotype ratios below the grid.
ABO Blood Type Punnett Square
Free to start. No credit card required.