[hinkley]

Turns out that due to the way genes splice you have ancestors that you have 0 genes from. The mitochondria and Y chromosome are conserved, but even 9 generations back there are good odds that some of your ancestors have been completely spliced out of your DNA, and a few whom you only got a couple genes from.

https://www.youtube.com/watch?v=HclD2E_3rhI

"only 72% of these 7th great grandparents will give you some of your genetics"

"over less than 400 years, 97% of your ancestors contribute nothing to your genetics"