You share half your DNA with each parent. Sounds right.
You share less than a quarter with your grandparents. Sounds right (some luck involved on which DNA was passed two generations).
Your cousin shares 10%. Since your parent’s siblings should share about 25% of their DNA, and their kids would be half that, then 10% for a first cousin seems right.
What am I missing? I’m not familiar with their process so may have misunderstood what’s being shown.
Edit: oh, is it saying you share 20% with each grandmother, or is it the same 20%? The same grandmother? Your parent’s had the same mother?
Each entry in this list has submitted their DNA to 23andme, and it detects enough overlap in the sample from this grandparent and both parents that it can’t tell which side to place them on.
What am I looking at here?
You share half your DNA with each parent. Sounds right.
You share less than a quarter with your grandparents. Sounds right (some luck involved on which DNA was passed two generations).
Your cousin shares 10%. Since your parent’s siblings should share about 25% of their DNA, and their kids would be half that, then 10% for a first cousin seems right.
What am I missing? I’m not familiar with their process so may have misunderstood what’s being shown.
Edit: oh, is it saying you share 20% with each grandmother, or is it the same 20%? The same grandmother? Your parent’s had the same mother?
“Grandmother, Both sides, 21.99% DNA shared”
Each entry in this list has submitted their DNA to 23andme, and it detects enough overlap in the sample from this grandparent and both parents that it can’t tell which side to place them on.
Thanks! I’m not familiar with their system so didn’t realise this was how it worked.