If You have 2 parents, 4 grandparents, 8 great parents, so if you go back 40 generations you’d have a supposed 1 Trillion ancestors, But only 100B humans have ever existed. Explain.
In: Biology
if your great great great great grandfather had 12 children and 3 of them moved across the country and themselves had 12 children each and a few decades later their children lost touch and eventually met again they’d have no idea they were related and there’d be hundreds more descendants by that time, eventually leading to a giant country of incest but not too detrimental to the species type incest because the genes are mixed enough across different families
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