/sci/ - Science & Math

[Anonymous No.12021619]

>Evolution didnt stop at the neck.

[Anonymous No.12021631]

This is true but humans are so insignificantly removed from each other on a genetic level that any implication of inferior intellect inherent to certain races is complete nonsense.

[Anonymous No.12021650]

>>12021619
Go back to /pol/

[Anonymous No.12021651]

>>12021631
>humans are so insignificantly removed from each other on a genetic level

Individuals are similar ergo Scots invented nothing more than Pygmees.

[Anonymous No.12021655]

>>12021619
BTFO

[Anonymous No.12021659]

>>12021651
Non-sequitur.

[Anonymous No.12021660]

>>12021651
*Pygmies

[Anonymous No.12021665]

>>12021651
>Implying a whole fucking lot.
Enviroment, motivations, trade routes, etc.

[Anonymous No.12021690]

>>12021655
Dogs are 100x different from each other while humans aren't.

[Anonymous No.12021694]

>>12021665
Estonians invented nothing more than pygmies. Checkmate

[Anonymous No.12021696]

>>12021631
>i could be as smart as von neumann if i wanted to

[Anonymous No.12021698]

>>12021690
Yes, that's the point. There is more genetic variance IN some dog breeds, than between various human populations. We're remarkably genetically similar.

[Anonymous No.12021700]

>>12021694
>Implying a whole fucking lot.
Enviroment, motivations, trade routes, etc.

[Anonymous No.12021717]

>>12021698
how did you determine that? there is just more variance in the first pcs.

[Anonymous No.12021730]

>>12021717
I'm trying to find the example one I use for the Labrador Retriever breed.

[El Arcón No.12021732]

it didn't stop at all

[Anonymous No.12021735]

>>12021698
>>12021717
>>12021730
Found it.

[Anonymous No.12021743]

>>12021730
the thing is pca is just rotation around in multidimensional space to orients data along the axis with the most variance. the thing is dog genetic variance could be an exponential decay with the first few pcs having substantially more variance than what proceeds them, while human is a shallow slope.

[Anonymous No.12021747]

>>12021743
But look how closely human populations cluster together, compared to the various dog breeds.

[Anonymous No.12021754]

>>12021631
>insignificantly removed
Quantify that please.

[Anonymous No.12021765]

>>12021747
a more useful metric would be fst. do you have dog breeds and human according to that?

[Anonymous No.12021770]

>>12021765
the reason i say this is because looking at just the first few pcs could account for 5% of the variance while the remaining 1000 pcs or whatever have the rest of the 95%. hence fst is more useful here.

[Anonymous No.12021805]

>>12021765
>>12021770
Since human FST has already been posted.

[Anonymous No.12021809]

>>12021747
If you took a small isolated population of men and women from the same ethnic background, you would get two distinct clusters, because only males have a Y-chromosome.

We know there are genetic variations between different ethnic groups of homo sapiens, which is why they have different eye color, skin color, hair color, hair type, etc.
It's not surprising that we get distinct clusters on these principal components.

What may be considered surprising (looking at figure C) is that PC1 is about 0.5% of variance, and PC2 is about 0.4% in homo sapiens; whereas in the left chart their PC1 is 22.92% and PC2 is 18.5%

[Anonymous No.12021826]

>>12021765
https://academic.oup.com/jhered/article/106/1/26/882754
According to this the fst of canids, mean (with standard error) and range :
>Among groups of dogs 0.0843 (0.0350) 0.0145–0.1251
>Among coyote locations 0.1105 (0.0211) 0.0188–0.2927
>Among all wolf locations 0.1525 (0.0101) 0.0124–0.3903
Interspecies
>Dog versus coyote 0.3198 (0.0185) 0.2061–0.5222
>Dog versus wolf 0.3379 (0.0113) 0.2228–0.5153
>Wolf versus coyote 0.2790 (0.0111) 0.0817–0.4480

According to cavalli-sforza >>12021754 the average fst among the human populations they studied was 0.13. The range is more telling though cause the average is I imagine not weighted, and it's comparable to coyotes and wolves, but quite higher than dogs. A japanese man is more distant from a congolese mbuti than a wolf is from a coyote.

[Anonymous No.12021835]

>>12021805
that's interesting, some humans aren't too far off from dogs. seems like the biggest divergence is subsaharan africa and the rest of the world.
https://en.wikipedia.org/wiki/Fixation_index

[Anonymous No.12021848]

>>12021835
Which makes sense when you consider the genetic bottleneck we faced upon leaving Africa, and admixture from Neanderthals, Denisova and so on.

[Anonymous No.12021897]

>>12021848
>>12021835
>>12021826
>>12021805
>>12021770
>>12021765
>>12021754
>>12021747
>>12021743
>>12021735
>>12021730
What does this mean

[Anonymous No.12021942]

>>12021897
I means dog breeds, which are uncontroversially established to have difference average intelligence levels and behavior predispositions, are more genetically similar at a whole than human subpopulations.

[Anonymous No.12022031]

>>12021897
>>12021897
A discussion whether or not various human populations cluster closely together by selecting some haplogroups or calculating overall genetic distance. How latter is actually calculated remains however obviously obscure in this thread.

The classic model used in the first half of the 20th century divided the human population into three to five races. Negroids, Caucasoids, Mongoloids, Americans (if not grouped together with Mongoloids) and Australoids (if not grouped together with negroids). This model is in general a somewhat good approximation for some racial boundaries. For example, the border regions where two races meet are characterized by a rather fast and very visible change in phenotypes. Going from caucasoid Delhi to mixed Nepal into purely mongoloid Tibet is such an example.

Modern genetics obviously has found out that there is no clear and sharp boundary of races in terms of single haplogroups or genes. This however doesn't mean that there is no difference at all. It also doesn't mean that various races don't cluster together which they obviously do.

Based on phenotypes, it is possible to define as many as 20 races. Race here is determined by a selection/set of concurring or clustering phenotypes that will allow someone to properly identify a member of such a race with the exclusion of all other races.
For example, one can't introduce the idea of a nordic race because the phenotypes that characterize the nordic race are found throughout Europe without an actually sharp boundary. However, one can easily draw a line between the European and the Siberian race allowing the proper identification of any member with a nearly non-existing false-positive chance. You can't mistake a hunter living in the northern Urals for a Russian for example.

The overall genetic distance between humans is actually not that small. The rather significant genetic distance actually observed in humans is probably the result of numerous emigrations.

[Anonymous No.12022045]

In the 2000s anti-science retards denied that evolution existed, now they deny that evolution doesn't apply to humans. It's the same shit different day, don't let the politicization impact you, stop playing teams.

[Anonymous No.12022065]

>>12022045
I fucked up how many negations I used but you should understand what I intended

[Anonymous No.12022069]

>>12022065
not sure if I don't

[Anonymous No.12022072]

>>12022065
i don't think i didn't not misunderstand but i won't'nt not worry about it

[Anonymous No.12022082]

>>12022031
Emigrations that have occured throughout the last 500,000 years and probably even before. It is generally accepted by now that all human races contain a non-negligible amount of genetic material that actually goes back to other hominids which are not regarded as belonging to homo sapiens proper. Europeans for example have mixed with Neanderthal, The aborigines are Denisovian to a significant degree. Black africans, presumed to be pure Homo sapiens, have genetic material inherited from some ancestral Homo erectus population. Thus it seems clear that there is not a single point in our history from which all modern races actually originate. Often one reads that this bottleneck occurred 50,000 years ago. Regardless that this is pure speculation. The fact that modern humans show traces of ancestral hominids, some of them believed to be dead for some ten thousands years proves that many races are the actual continuation of a far older population that simply got replenished by incoming waves of immigrating human populations rather than the result of a single exodus wave.

[Anonymous No.12022084]

>>12022069
>>12022072
I deserve this

[Anonymous No.12022141]

>>12021659
A random pygmy will be as smart as a random scot.

[Anonymous No.12022147]

>>12021694
Except Skype maybe?

[Anonymous No.12022159]

>>12021694
Or the Schmidt telescope?
Thincan, Transferwise, Kazaa and Joost are less famous but still more impressive than anything by any Pygmy.

But surely even smooth brains like you have heard of Skype and can conceive of different telescopes?

[Anonymous No.12022166]

>>12022065
No worry dog you didn’t fuck up nothing.

[Anonymous No.12022228]

>>12022141
Imagine believing this

[Anonymous No.12022257]

>>12022141
Solid bants