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Thread: Geometric expansion of ancestors?

  1. #1 Geometric expansion of ancestors? 
    Forum Cosmic Wizard icewendigo's Avatar
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    Jun 2006
    Posts
    2,150
    This must be really easy but I'm stepping around it...


    We have;
    2 parents (1 gen)
    4 grand-parents (2 gen)
    8 3 generations past
    16 4 gen
    32 5 gen
    64 6 gen
    128 7 gen
    ... ...

    if we continue to 100 generations back we get
    1,267,650,600,228,229,496,703,205,376
    I dont even know how thats called a gazillion billion,
    (but everything points to the fact the population was smaller before agriculture)

    I conclude theres a gigantic flaw in my reasoning, what is it im missing?


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  3. #2  
    Forum Freshman electricant's Avatar
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    Sep 2006
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    Inbreeding. People marry distant cousins without realising.

    Your reasoning assumes a succession of ancestors who are completely unrelated going back 100 generations.


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