You don't need a dna sample or a computer program to get the point of origin of any persons ancestors. The answer is always the same: Africa.

I think it was the "can't imagine" part of the picture he was asking about, actually. I find it odd too. You would expect that someone with such a poor imagination could very easily be replaced by a machine these days.

And some bodies passed biology 40 or more years ago, and then biology passed them.

So you're saying a process which creates more variability will make a particular population be more the same as each other. Right. That makes sense.

You're getting warmer. Race is a make believe purely social construction which has no correlation with genetics. 100% of it is not genetically determined.

That there is no genetic test you can perform which will allow you to classify an individual as belonging to a particular "race". I'm not sure how you translate a similar test to large groups or populations, in any meaningful way.

Well enough to understand that it precludes any useful biological definition of race.

oh, also... what part of there is no group of genes which can be usefully used to identify race did you miss?

I have never heard race ascribed to any species other than human.

One of the neat things genetics shows is that everyone is mixed up, whether it is visually noticeable to you or not.

True, but you can't tell that the person you've spotted as Mongolian isn't carrying Scandinavian genes, or which ones, or how many (leaving aside what a "Scandinavian" gene is"), making the visual determination you have made essentially useless.

Skin color is genetically determined. Skin color does not, however, define race.

Because the suggestion that race is something that exists at the biological level is a falsehood. Every genetic trait you can think of exists in more than one population group. From your perspective, it might be easy to note that Norther Europeans are more closely related, on average, to Zulu tribesmen than Australian Aborigines are. There is no genetic trait or group of traits you can check for and use to make a determination of race.

Except that, genetically, there is no such thing as race.

Wouldn't it be about break even for each property owner, who would also be collecting rent?