what's the real story on human evolution?
What's the real story on human evolution?
Bentley Cruz
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Easton Evans
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Hunter Taylor
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Isaiah Edwards
According to both the multiregional (MR) and the out-of-Africa (OOA) model, our recent Homo ancestors originated in Africa. Both models do not dispute that H. erectus migrated out of Africa over 1m years ago, spreading across Eurasia.
The difference between both models: According to the MR model, there was interbreeding between H. erectus and its descendant populations across Eurasia, therefore H. sapiens had evolved across all of Eurasia and Africa contemporaneously. According to OOA, H. sapiens evolved in Africa first and then migrated out of Africa, eventually displacing the other hominin populations in Eurasia.
There's evidence for both models. Recent genetic studies have found that there was interbreeding between H. sapiens and other closely related members of Homo, such as Neanderthals and Denisovans, and this interbreeding happened as recently as tens of thousands of years ago. However, genetic evidence also shows Sub-Saharan Africans didn't interbreed with Neanderthals. Combined with the fact that the concept of "species" gets fuzzy at times (hence Homo sapiens sapiens), and that we are piecing the puzzle with archaeological and genomic studies, and you have a more complex story of recent human evolution.
Again, both models agree that there was a migration of H. erectus out of Africa approx. 1m years ago, and both models agree there was a single genetic origin of modern humans. The distinction is whether modern humans arose in Africa first and migrated out to replace other members of Homo (OOA), or that these closely-related Homo populations interbred across Eurasia and Africa, leading to a concurrent rise of modern humans across the continents (MR).
There's no mainstream politicization on this. While OOA is still more widely accepted, there is growing evidence of interbreeding among Homo populations, regardless of where modern humans first appeared. I've never even heard about any political controversy over these theories except from fringe communities.
Jayden Robinson
>out-of-Africa
BTFO by fossil evidence:
sci-news.com
B-but we wuz....
Aiden Jones
What are these axis a measure of?
Wyatt Jones
aliens at some point
final true redpill is when you accept that they have never left us
Sebastian Morris
Rh-
Colton Moore
>contemporaneously
Sebastian James
Christcucks fuck off
Everything you need to know:
evolutionfaq.com
Evolution is simply stated as change over time. Languages, societies, and knowledge all have the ability to evolve. In Biology, evolution refers to the change of genetic traits over time.
What is Natural Selection?
Natural Selection is one of the mechanisms which drives evolution. It is popularly characterized as "survival of the fittest," though that is not always the most accurate description. It is the tendency for life forms which are best suited to their environments to have a better chance to reproduce than those that are not. For example, in a cold environment, an animal with lots of fur is more likely to reproduce than a bald animal, since the bald animals will die more quickly.
Don't Mutations Only Cause Problems, And Do Not Create New Information?
While it is true that many mutations can cause problems for an organism, sometimes lethal, not all mutations are harmful. Most mutations are caused by single-point errors in the copying of a strand of DNA. For example, a strand of ATAGC may change to ATATC. This can have three major effects: a deleterious effect, a positive effect, or no effect at all. Deleterious effects, those which threaten the survival of the organism, will not accumulate, because they will kill the organism before it has a chance to reproduce. Conversely, mutations which cause no effect or a positive effect will accumulate in a population's genome. This is how Natural Selection works. It "selects" for positive changes in the genome, because only the positive changes will accumulate.
Nolan Adams
"The ethnic groups in West Asia refers to the various peoples that reside in West Asia. The region has historically been a crossroad of different cultures. Since the 1960s, the changes in political and economic factors (especially the enormous oil wealth in the region and conflicts) have significantly altered the ethnic composition of groups in the region. While some ethnic groups have been present in the region for millennia, others have arrived fairly recently through immigration. The five largest ethnic groups in the region are Arabs, Azerbaijanis, Kurds, Persians, and Turks[1] but there are dozens of other ethnic groups which have hundreds of thousands, if not millions, of members.
Other Indigenous, native, or long-standing ethnic groups include: Arameans, Armenians, Assyrians, Balochs, Berbers, Copts, Druze, Gilaks, Greeks, Jews, Kawliya, Lurs, Mandeans, Mazanderanis Mhallami, Nawar, Samaritans, Shabaks, Talishis, Tats, Turcomans, Yazidis, and Zazas.
More recent migrant or diaspora populations include Albanians, Bengalis, British people, Bosniaks, Chinese, Circassians, Crimean Tatars, Filipinos, French people, Indians, Indonesians, Italians, Malays, Pakistanis, Pashtuns, Punjabis, Romani, Sikhs, Sindhis, Somalis, Sri Lankans, and Sub-Saharan Africans."
Adrian Williams
It's a principal component analysis of genetic (fst) distance. the x-axis is primarily african vs non-african and the y-axis is primarily between the various non-african populations
en.wikipedia.org
blogs.discovermagazine.com
Colton Powell
why do homo erectuses look like blacks
Ian Roberts
Where do abbos fall on this map?
Brody Sanders
and why are they in asia
none of this makes no damn sense
William Turner
>not all mutations are harmful
Have beneficial mutations been observed between generations in a lab? Not already existing genetic traits being beneficial, but new mutations?
Nathaniel Sanchez
I'm not sure if abbos were represented in the samples. They are probably close to the Polynesians if I had to guess.
Liam Price
Yes, like the ones that cause immunity to antibiotica
Jose Harris
i wonder if australian aborigines are the closest race genetically to the common ancestor
Jose Bell
> muh darvinism
Species are created by mutation, mainly due to the inversions of the earth's magnetic field, and the exposure of earth at those times to larger amounts of sun's radiation. Abyssal and nocturnal creatures are the ones with the oldest genotypes, being the least affected by the sun.
Hunter Rivera
alien genetics
Jace Ramirez
The samples seem to stop at SE Asia. No abbos got tested
Logan Myers
And how exactly does that contradict darwinism???
Landon Ramirez
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