MyHeritage DNA Results for Bradley J. Johnson

    Parents and children share 50 percent of their DNA with one another.  While the shared DNA between full siblings includes 25 percent of the mother’s DNA and 25 percent of the father’s DNA, the DNA shared between a parent and child is 50 percent of that parent’s DNA.   Another way to look at it is, if your parents’ genes combined were a deck of say 52 cards, you would receive 26 of them.  The sibling directly behind you would also receive 26 cards, and of these about half of those cards would end up being like yours.  So as more siblings are born, they receive 26 cards from their parents, but share only 13 cards with each of the older siblings, note these 13 cards are not the same cards that the older siblings have.  This pattern would continue with each sibling born.  I am number 2 in the family, my brother Chris is number 5, therefore we have different playing cards, but we come from the same family.

     It seems like brothers and sisters should have the same ancestry background. After all, they both got half their DNA from their mother and half from their father.  Because of how DNA is passed on, it is possible for two siblings from the same parents, could have some big differences in their ancestry at the DNA level.  Culturally they may each say they are “1/8th Irish” but at the DNA level, one may have no Irish DNA at all.  It is definitely possible for two siblings to get pretty different ancestry results from a DNA test. Even when they share the same parents.

MyHeritage DNA also provides maps of the different ethnicities from in the world they originated.  The following are the results of my DNA.  The results are 98.9% of my ethnicity is North and West European.




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