The amount of DNA you overlap with your siblings can be so revealing, the percentages vary quite a bit. Close relationships don’t always map to DNA shared. Haplogroups are akin to the original tribes of humans from different parts of the globe. And if you get very nerdy you can look up all those 2nd, 3rd and 4th cousins who you share NDA and map the tiny percentage overlaps for each chromosome.
1
2
3
4
5
6
7