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Examples of Blood Type Inheritance 

On this page, we offer some example of how genetics works with blood groups.

Example 1

This example has a family where the father is blood type A- and the mother is B-.  There is one boy with a blood type of AB- and a girl with blood type O-.  The following diagram shows how this can happen:

Clearly, because of the differnces in the children, one can quickly discount the possible pairings of AA and BB for the adults.

Example 2

In this example we face the uncomfortable situation where the father is not the true paternal father.

1. What is a blood type? 

2. How blood types are inherited

3. The Rh blood type system - positive or negative

4. Paternity testing and blood types

5. Examples of blood type inheritance

6. A quick history lesson

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