Actually it’s worst in Asia. Gengish Khan Y chromosome mutation shows up in 2% of Asian population.
So this is how gene pool survival works.
Most of us will have very few to no descendants 1 thousand years from now.
Some of us will father the rest.
How to compute?
Well, each of your children is half your descendant. So if you have 2 children, you have 1 descendant in the next generation. That number may decrease or increase.
After 1 thousand years, it may actually go to 0.