in order to be born, you needed: 2 parents 4 grandparents 8 great-grandparents 16 second great-grandparents 32 third great-grandparents 64 fourth great-grandparents 128 fifth great-grandparents 256 sixth great-grandparents 512 seventh great-grandparents 1024 eighth great-grandparents 2048 ninth great-grandparents, For you to be born todays from 12 previous generations you needed a total of 4096 over the last 400 years.

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