How to Figure Out Your Blood Type Based on Your Parents

The type of blood you can receive depends on your blood type.
••• Photos.com/AbleStock.com/Getty Images

There are four different blood types: type-O, type-A, type-B and type-AB. Type-O, the most common, is known as the universal donor because any person can receive a blood transfer of type-O blood. Type AB is known as the universal receiver because type-AB can receive a blood transfer of any type of blood. You can only find possible blood types from knowing your parents' blood types; you cannot say with certainty which blood type you have just based on your parents.

    Make a two row by two column table.

    Label the two columns based on your mother's blood type. If your mother has type-A blood, enter "A" over the first column and "O" over the second column.

    Label the two rows based on your father's blood type. For example, if your father has type-AB blood, enter "A" to the left the first column and "B" to the left of the second column.

    Combine the column with the row to find the possible blood types. For this example, in the upper left box, you will get "AA." For the upper right box, you will get "AO." For the lower left box you will get "AB." For the lower left box you will get "BO."

    Drop the "O" from "AO" or "BO," if applicable. In this example, drop the "O" from "AO" to get "A" and the "O" from the "BO" to get "B." Therefore, you could have type-A blood, type-B, blood or type-AB blood.

Related Articles

2 Examples of Heterozygous Traits
What Are the Characteristics of a Homozygous Phenotype?
What Is a Trait Which Results From Two Dominant Genes?
Types of Genetic Crosses
The Respiratory & Circulatory System in the Human Body
What Are 3 Functions of the Umbilical Cord?
How to Create Punnett Squares
How to Find the Missing Side of a Right Triangle
How to Find a Ratio for a Punnett Square
What is a Gene?
The Difference Between Human Fleas & Dog Fleas
The Differences in Fraternal & Paternal Twins
Examples of a Recessive Allele
How to Calculate Function From Ordered Pairs
What Are Examples of Homozygous Dominants?
What Does Homozygous Mean?
What Is the Dominant Phenotype?
How to Number Human Ribs
What is the Genotype for the Roan Color?