Chart: How Much DNA You Inherit

You get exactly 50% of DNA from each parent. That is the only “exact” thing about DNA. While you get about 25% from each grandparent, that number is an estimate. DNA is inherited randomly, so you might get a higher percentage from one grandparent than another.

Here is how much DNA you inherit:

YOU 100%
Parents 50%
Grandparents 25%
Great-grandparents 12.50%
Gr-Gr-Grandparents (2) 6.25%
Gr-Gr-Gr-Grandparents (3) 3.125%
Gr-Gr-Gr-Gr-Grandparents (4)  1.56%
Gr-Gr-Gr-Gr-Gr-Grandparents (5)  .78%


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