Well, as an example....In geneaology and biology, however, it is calculated by a chain of births
4 generations:
baby
mom and dad
grandma and grandpa
greatgrandma and greatgrandpa
And for those of us in our senior years the greats could easily have been born before the Civil War. And that is about as far back as DNA testing is at all reliable and it gets pretty iffy even then. By the great greats, unless there has been no racial mingling, a Native American ancestor would be pretty undeterminable in the maze of all our complex DNA. Virtually everybody of European descent will test for some Native American heritage but for most of us it will be well under 1% though statistically more than what they came up with for Elizabeth Warren. Which makes her less Native American than most of us of European descent.
And we don't even know that for sure since the guy who tested her didn't have a Native American sample to compare so used samples from Mexico, Peru, and some other central or South American country--can't remember which. And even then she came in hugely under 1% for those matches.
A generation is between 40-70 years.
Bullshit.
That would mean nobody ever has children until they're at least 40 years old. Think about it.
That's why I said 20 years. You could look it up.
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great great grandfather fathered 18 children by 2 wives.
(9 each)
Youngest born about a year after he celebrated his 65th birthday.
His second wife would not have passed on the same DNA materials his first wife did.
If his first wife had NA DNA, his first 9 children would have carried it, but if the second wife didn't, neither would the 9 children she bore.
And how is this in any way related to the post quoted?
It's a comment on your 20 years=1 generation.
by YOUR standards, his daughter was 3 generations (60 years) younger than him.
(Not all kids are born when their parents are in their early 20s.
Of course they weren't. But what he tried to sell here was that a generation means "40 to 70 years".
Which is absurd.