Since the number of direct ancestors doubles every generation you go back, individual lineage is closer to a bowl of spaghetti than a family tree.
Every generation you go back, you share less and less genetic markers. You share exactly 50% of your DNA with each parent, about 25% with each grandparent etc. Eventually you’ll find a direct ancestor with whom you share no DNA markers. It’s 12 generations back, on average.
So, go back a few hundred years, and you’re not genetically related to anybody. Go back a thousand, and everyone’s list of ancestors is indistinguishable.
Even fucking a sibling is okay (probably,) from a genetic viewpoint. It’s when you have multiple generations doing it when you run into trouble. Genetically speaking.
The concept of a bloodline is incoherent.
Since the number of direct ancestors doubles every generation you go back, individual lineage is closer to a bowl of spaghetti than a family tree.
Every generation you go back, you share less and less genetic markers. You share exactly 50% of your DNA with each parent, about 25% with each grandparent etc. Eventually you’ll find a direct ancestor with whom you share no DNA markers. It’s 12 generations back, on average.
So, go back a few hundred years, and you’re not genetically related to anybody. Go back a thousand, and everyone’s list of ancestors is indistinguishable.
…So you’re saying it’s OK to fuck my cousin
Depends on how far removed the cousin is. Literally.
Nice, she moved like 1,000 miles away, so it’s SO on next family reunion!
If he’s okay with it, I don’t see any issues.
Even fucking a sibling is okay (probably,) from a genetic viewpoint. It’s when you have multiple generations doing it when you run into trouble. Genetically speaking.
That’s assuming you have a family tree and not a family column.