From Newsgroup: talk.origins

I just watched an episode of Finding your Roots and Rosanne Cash and
Clint Black were both found to have had African slave ancestors.
Neither was aware of such ancestors. James Watson was found to have
around 16% African DNA in his genome. It turns out that around 3.5% of
people that consider themselves to be white have some African ancestry (greater than 1% African DNA). It takes 5 generations or more to get
down to this level, so a lot of these matings occurred before the Civil
War. The rate goes up to 13% of the white population in states that had
the largest slave populations like Louisiana.

I had not thought of this before, but 23 and Me provide a breakdown of
where your DNA comes from, and millions have that information.
Population genetics has always published on how much European DNA is in
the African American population, and I do not recall anyone dealing with
the percentage of African DNA in other racial groups.

Any wannabe eugenicist have their work cut out for them. I can imagine
the Klan and neo-Nazis requiring genotypes for their members.

Ron Okimoto

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From Newsgroup: talk.origins

RonO wrote:

I just watched an episode of Finding your Roots and Rosanne Cash and
Clint Black were both found to have had African slave ancestors. Neither
was aware of such ancestors.-a James Watson was found to have around 16% African DNA in his genome.-a It turns out that around 3.5% of people that consider themselves to be white have some African ancestry (greater than
1% African DNA).-a It takes 5 generations or more to get down to this
level, so a lot of these matings occurred before the Civil War.-a The
rate goes up to 13% of the white population in states that had the
largest slave populations like Louisiana.

I had not thought of this before, but 23 and Me provide a breakdown of
where your DNA comes from, and millions have that information.
Population genetics has always published on how much European DNA is in
the African American population, and I do not recall anyone dealing with
the percentage of African DNA in other racial groups.

Any wannabe eugenicist have their work cut out for them.-a I can imagine
the Klan and neo-Nazis requiring genotypes for their members.

Decades ago someone pointed out to an Afrikaner that the early settlers
had not infrequently married natives, and that he was probably descended
to some degree from black people.

He did not reject the idea, as I would have expected, but said:

"Well, I hope at least they were Zulu".


William Hyde

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From Newsgroup: talk.origins

On 5/21/2026 12:41 PM, William Hyde wrote:

RonO wrote:

I just watched an episode of Finding your Roots and Rosanne Cash and
Clint Black were both found to have had African slave ancestors.
Neither was aware of such ancestors.-a James Watson was found to have
around 16% African DNA in his genome.-a It turns out that around 3.5%
of people that consider themselves to be white have some African
ancestry (greater than 1% African DNA).-a It takes 5 generations or
more to get down to this level, so a lot of these matings occurred
before the Civil War.-a The rate goes up to 13% of the white population
in states that had the largest slave populations like Louisiana.

I had not thought of this before, but 23 and Me provide a breakdown of
where your DNA comes from, and millions have that information.
Population genetics has always published on how much European DNA is
in the African American population, and I do not recall anyone dealing
with the percentage of African DNA in other racial groups.

Any wannabe eugenicist have their work cut out for them.-a I can
imagine the Klan and neo-Nazis requiring genotypes for their members.

Decades ago someone pointed-a out to an Afrikaner that the early settlers had not infrequently married natives, and that he was probably descended
to some degree from black people.

He did not reject the idea, as I would have expected, but said:

"Well, I hope at least they were Zulu".

William Hyde

Google claims that an Afrikaner study found 98.7% of white South
Africans had mixed non European DNA in their genomes (Asian and
African). 96% had Khoisan (indigenous Khoe-San) DNA and averaged 1.3%
African ancestry. The paper cited estimated that there was a single
admixture event (They do not estimate how many individuals were
involved) 9.3 generations ago. There were only 77 Afrikaner individuals
in the study, so a larger population sampling could change the
percentages. Inference is that only 1 individual did not have Asian or African DNA in their genome and 74 had Khoe-San DNA. The European
population colonized South Africa in the late 17th century.

Research paper:
https://pmc.ncbi.nlm.nih.gov/articles/PMC7038537/

Ron Okimoto

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