Blood Type Punnett Square Calculator
A Blood Type Punnett Square Calculator predicts potential blood types of offspring based on parental blood types. It uses genetic inheritance principles to show possible combinations of ABO and Rh factors. This tool helps understand dominant and recessive gene interactions, showing probability percentages for each blood type outcome. Essential for genetics education and family planning.
Calculator
How It Works
The calculator uses Mendelian genetics. Blood types are determined by combinations of parental alleles (A, B, O) and Rh factor (+/-). The Punnett square shows all possible gene combinations. ABO types follow co-dominance (A and B) and recessiveness (O). Rh factor follows simple dominance (Rh+ dominant). The formula considers all allele combinations from both parents to determine probable blood types.
Development Process
This calculator was developed by: 1) Researching blood type genetics, 2) Creating genotype mappings for blood types, 3) Implementing allele combination logic in JavaScript, 4) Designing user interface with HTML/CSS, 5) Testing with known genetic combinations, 6) Adding educational resources and FAQs.
Genetic Formula
Blood type inheritance follows the formula:
Child's genotype = (Allele from Parent 1) + (Allele from Parent 2)
Phenotype determination:
- AA/AO = A type
- BB/BO = B type
- AB = AB type
- OO = O type
FAQs
How accurate is the blood type calculator?
The calculator provides theoretical probabilities based on Mendelian inheritance. While accurate for basic combinations, real-world results might vary slightly due to rare genetic factors. It assumes independent assortment of genes and doesn't account for mutations.
Can this predict Rh factor?
Yes, the calculator considers both ABO and Rh factors. Rh+ is dominant over Rh-. If either parent has Rh+, the child has 50-100% chance of Rh+ depending on parental genotypes.
Why are some blood types impossible?
Certain combinations are genetically impossible. For example, two O parents can't have AB child. The calculator filters out impossible combinations based on allele inheritance rules.