Modern humans may have inherited some Neanderthal genes
I know virtually nothing about this subject, and I will try very hard to avoid odious comparisons between Neanderthals and anyone else, but it appears that white and Asian people, but not sub-Saharan Africans, have 1-4% Neanderthal genes in our genomes. You may read news articles about it in the New York Times free or in Science with a subscription. Science also has provided a special feature on the Neanderthal genome and has made two technical articles available without charge, but not the news article cited above. This paragraph has almost completely exhausted my knowledge of the Neanderthal genome.
131 Comments
DS · 7 May 2010
So, Neanderthals were not human beings and contamination was not an issue. Glad that's finally settled. Now the real fun can start.
Did Neanderthals have the same chromosome complement as chimpanzees, or did they have the same fusion seen in humans? Their mitochondrial DNA is intermediate between chimps and humans as is their nuclear DNA, but how many SINE insertions do they share in common with humans? Can the Neanderthal nuclear DNA found to be introgressed into modern humans be used to study human adaptation and migration? How will this compare to the mitochondrial and Y chromosome data? What regulatory changes were important in the evolution of human morphology and which occurred before the split with Neanderthals? Can mitochondrial and nuclear sequencers be obtained from even older hominid fossils and how will they compare to the Neanderthal sequence? How are the creos ever going find a way to spin this that doesn't make them look bad? They must live in constant fear of things like this being discovered.
atheistwars · 7 May 2010
This comment has been moved to The Bathroom Wall.
John Kwok · 7 May 2010
This discovery is additional confirmation of the "Out of Africa" migration hypothesis, since Africans lack traces of the Neanderthal genome (Current Africans were not part of the migration out of Africa which allowed Homo sapiens to populate Europe, Asia, and eventually, Australia and the Americas.). This discovery also confirms possible skeletal evidence of hybridizations between Homo sapiens and Homo neandertalensis in the Middle East, where their skeletons have been found, often in the same sedimentary strata.
Not surprisingly, Carl Zimmer has an especially lucid account of this discovery, made primarily by Swedish geneticist Svante Paabo and his team at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany:
http://blogs.discovermagazine.com/loom/2010/05/06/skull-caps-and-genomes/
Diogenes · 7 May 2010
So this explains the Tea Party!
Wheels · 7 May 2010
I thought that earlier mitochondrial DNA analysis ruled out the interbreeding hypothesis?
John Kwok · 7 May 2010
John Kwok · 7 May 2010
DS · 7 May 2010
John Kwok · 7 May 2010
John Kwok · 7 May 2010
Gary · 8 May 2010
This is truly amazing to me, since neanderthals have 24 pairs of chromosomes and we have 23. This shows a lot more ability to breed when there are differences between genomes. Have they said anything about how this sheds light on when and how our chromosomes fused together?
djlactin · 8 May 2010
detailed discussion of the paper here: http://johnhawks.net/weblog; also see http://dienekes.blogspot.com for a skeptical perspective
Malchus · 8 May 2010
CS Shelton · 8 May 2010
Small and outbreeding ethnic groups of homo sapiens are going extinct these days (mostly indigenous peoples). But are they truly going extinct when their DNA is still around? The idea that neanderthals didn't shuffle off without leaving a mark on us really appeals to me, in that I have an emotional need to see slivers of hope in the Holocene Extinction.
Within my species I'd like to see a similar project: Find DNA from extinct Indian tribes, isolate any unique areas of it, and compare to living people in the USA. Did they leave a mark?
Another point of curiosity as an artist with an interest in the cosmetic differences of race - Could the genes responsible for neanderthal skeletal features be discovered, then compared against modern groups that look similar? Example: Many French and Chinese people receding chins, which is a classic neanderthal feature. Did they inherit them from our extinct cousins?
Given what I've seen of the study (I'll need to read it more deeply, time permitting), it's safe to assume most white people are part neanderthal. That's fun to know about oneself, really.
This is all very unscientific and useless reflection, so apologies to anyone annoyed by it. Carry on.
hoary puccoon · 8 May 2010
Malchus and Gary--
PZ Myers has a really good post explaining how two individuals with different numbers of chromosomes can produce offspring. See his post "Basic: How Can Chromosome Numbers Change?" April 21, 2008, on Pharyngula.
The gist of it is, two individuals with different numbers of chromosomes have reduced fertility, but reduced fertility doesn't mean no fertility.
John Kwok · 8 May 2010
notedscholar · 8 May 2010
I was reading this study last night. The problem here is that unsavory origins of Westerners is in conflict with the overwhelming evidence of good performance, health outcomes, scientific progress, etc., from the West. In fact, if we come from Neanderthals, how did we ever get where we are? An ancillary question arises: If we have these defective genes, how did we ever figure it out?
NS
TomS · 8 May 2010
Why do you think that Neanderthals were "unsavory" or "defective"? Or that the "west" is representative of modern Homo sapiens, or of what is "savory" or not "defective"?
Stanton · 8 May 2010
raven · 8 May 2010
John Kwok · 8 May 2010
John Kwok · 8 May 2010
raven · 8 May 2010
Matt Young · 8 May 2010
harold · 8 May 2010
stevaroni · 8 May 2010
stevaroni · 8 May 2010
Henry J · 8 May 2010
Wasn't this documented in Clan of the Cave Bear with Daryl Hannah?
Peter Henderson · 8 May 2010
Peter Henderson · 8 May 2010
Here's the link by the way:
http://www.answersingenesis.org/articles/2010/05/08/news-to-note-05082010
djlactin · 8 May 2010
Me Neanderthal. Me have protruding nose; occipital bun, hair around chin and throat... well okay, that's all. But as a Caucasian living in Asia (and a reader of a lot of stuff), I have made a few observations. Caucasians are anomalous. All humans (except "us") have brown skin, wide noses, black hair (except a few blond aborigines), brown irises and hairless skin; weak or absent facial hair. Consider (particularly) European Caucasians: pale skin; narrow, protruding noses; hair color from ash blond to black with excursions into red; irises ranging from gray through blue to violet and a large range of 'browns' from pale to deep; many (myself excluded) with thick body hair.
Consider a migrant from Africa: as "black" as any modern African. Consider the disadvantages of this type in an environment with weak sunlight and cold air.
Pale skin (associated with pale irises?): an advantage in the sunlight-poor northern latitudes (vitamin D; folate); protruding noses: efficient heat and moisture exchangers; body hair: glaciation. Consider that Neanderthals had evolved for more than half a million years in this environment. Genes from such a pool would have abetted the invasion of the newbies.
Me Neanderthal. Me name Thag.
raven · 8 May 2010
Mike Elzinga · 8 May 2010
harold · 8 May 2010
SWT · 8 May 2010
Dornier Pfeil · 8 May 2010
Dornier Pfeil · 8 May 2010
Matt Young · 8 May 2010
Vaughn · 8 May 2010
raven · 8 May 2010
Paul Burnett · 8 May 2010
Andrew Stallard · 8 May 2010
Andrew Stallard · 8 May 2010
One thing I noticed is that the point of comparison are the human accelerator genes not found in chimps are used in order to establish how related humans and Neanderthals are. By using chimps as a baseline, isn't that enough to declare the study bogus in the eyes of Creationists, since they can say it relies on a question-begging evolutionary assumption of human-chimp relatedness?
djlactin · 8 May 2010
Hey Harold: you take me too seriously. I use the term "caucasian" only because it is in common use (and less offensive/more accurate than "white"). My point was that European caucasians (excluding caucasians currently living in India, who have been selected for darker skin -- carcinomas and such) are starkly different from, shall I say, "typical" humans. The characteristics that I listed MAY result from Neanderthal introgression. Sincerely, Thag Simmons.
Peter Henderson · 8 May 2010
Shebardigan · 8 May 2010
My last intensive read-up of our understanding of Neandertals told me that they were obligate carnivores.
If this be true, then, in combination with the fact that they were perhaps the most horrifyingly efficient predator in their size range for a very long time, it gives us a fairly good set of possible reasons why we replaced them.
They would have had to live in small, geographically dispersed groups. This is nearly always characteristic of efficient carnivores. Our ancestors, being a bit less locked in to a single mode of acquiring nutrition, had no such limitations. If the Neandertals, even being considerably larger than we, were only encountered in groups of a dozen or so, but we could show up with a couple hundred or more, marginalization of Neandertals, followed by extinction, would have been inevitable.
I have often wondered whether the legends of "giants" in some social traditions represent a memory of encounters with Neandertals -- large, strong, solitary, cannibalistic, lacking in speech facility, likely to steal your cattle...
raven · 8 May 2010
Frank J · 8 May 2010
Bobsie · 8 May 2010
FYI, some recent research findings,
Ancient DNA Reveals Surprisingly Few Differences In Human and Neanderthals,5/6/2010, HHMI News
http://www.hhmi.org/news/hannon20100506.html
Shebardigan · 8 May 2010
John Kwok · 8 May 2010
Who said I'm a liberal? Apparently you haven't heard of my "affection" for a certain American president and two of his closest aides, who, unfortunately, are fellow alumni of our high school.
Anyway I was concerned that this thread might digress into more political baiting that's occurred elsewhere here at PT, and thought that given the historic importance of this report on the "rough draft" of the Neanderthal genome, didn't want to see any similar incidents here.
David Fickett-Wilbar · 8 May 2010
John Kwok · 8 May 2010
Shebardigan · 8 May 2010
Bobsie · 8 May 2010
W. H. Heydt · 8 May 2010
harold · 8 May 2010
harold · 8 May 2010
djlactin -
The article clearly says that modern European and Asian populations both show overlap with the Neanderthal genome. As I mentioned, people with physical traits that we would class as "Asian" live successfully in all climates (actually, so do all types of people).
I'm not trying to give you a hard time; I thought your comment was kind of interesting.
stevaroni · 8 May 2010
David Fickett-Wilbar · 8 May 2010
Dave Luckett · 8 May 2010
TomS · 9 May 2010
Frank J · 9 May 2010
TomS · 9 May 2010
harold · 9 May 2010
Sylvilagus · 9 May 2010
Andrew Stallard · 9 May 2010
TomS · 9 May 2010
harold · 9 May 2010
Mike Elzinga · 9 May 2010
raven · 9 May 2010
Mike Elzinga · 9 May 2010
Andrew Stallard · 9 May 2010
Andrew Stallard · 9 May 2010
harold · 9 May 2010
Gerald · 9 May 2010
back to the master raceas close to God as we can?Dave Luckett · 9 May 2010
harold, I was not denying anything you said. I was questioning the power of natural selection in the case of humans only. The question, to my mind, is not whether adaptations to environment exist among humans - of course they do - but what is their power relative to the unique human capability of technology?
The Neanderthals were naturally adapted to a subarctic environment - Europe and western Asia in the Wurm and earlier ice ages - as far as it is possible for a hominid to be. They had in fact speciated under selection pressure, as the DNA studies show.
Nevertheless, they were rapidly displaced and then became extinct across their entire range (save for some arguable relict genes they may have passed to modern humans) when they came into contact with H. sapiens, a species apparently less well-adapted to the cold than they. It is difficult to attribute this to purely environmental factors, because it happened during the last ice age, when Europe was as cold as it had ever been. When the ice receded, beginning about twelve thousand years ago, the Neanderthals were already gone, and H sapiens - probably already the sole remaining hominid - was about to begin the slow development of agriculture and the climb (if it be a climb) to civilisation.
Positing that this summary is a roughly correct (as always, I stand ready to be corrected), it poses a conundrum. In what ways was H sapiens more fit for the environment of Europe in the ice age than H neanderthalis? And what does this tell us about ourselves?
Dax Williams · 9 May 2010
My father died in 1974. He always used to say I was a neanderthal. Guess he was ahead of his time
Robert Byers · 10 May 2010
A lesson here is also that once again the textbooks must be rewritten because what was concluded before had no science behind it. It can't. Origin issues are not scientific ones as the great creationist Henry Morris said.
Next week, I predict, they will find fully genetic Neanderthals living in New York city.
Probably voting Democratic.
Dave Lovell · 10 May 2010
hoary puccoon · 10 May 2010
As was demonstrated by a poster above, another creationist mantra is that science is continually changing its conclusions, therefore none of it is right.
The ability to adapt to new evidence is, of course, the basis and great strength of science. But in this case, as in many others, the amount that science actually changed its conclusions is largely in the minds of newspaper headline writers. Everyone working in the field seemed to be aware that the lack of Neanderthal genes in modern human mitochondria didn't necessarily mean there were no Neanderthal genes in modern human nuclear DNA. So this study wasn't so much correcting an error as refining a somewhat fuzzy picture.
Pete Dunkelberg · 10 May 2010
Points in favor of AiG's accommodation: Dornier Pfeil earlier reminded us of the Nephilim, quite consistent with possible interbreeding occurring in the middle east. And don't forget Lilith, Adam's first wife and later Dembski's nemesis.
eric · 10 May 2010
Fintan · 10 May 2010
I don't like the species name Homo Sapiens, for those who may not know, it means wise man,a bit arrogant to call ourselves that, with plenty of evidence to the contrary. Anyway "Homo Sapiens" were only one of several human sub-species that co-existed in the past.
Genetic studies on sub-saharan Africans has found significent archaic homonoid genetic insertions that are not found in other populations. Unfortunately climatic and topographic issues in Africa do not provide a good envoirment for the preservation of ancient dna bearing remains.So it is impossible in the present to genetically reconstruct this African ancestor[s].There is also a very strong morphological case for a large imput from Asian Homo Erectus in modern East Asians. Hopefully antropology will come to a rational consensus between the two extremes ,out of africa and multi-regional emergence.
harold · 10 May 2010
harold · 10 May 2010
Indeed, we don't know what the genetic barriers, if any, were for hybridization between the hominid species we recognize almost solely on the basis of bone morphology.
In fact, although I suppose it's highly unlikely, a scenario in which the H. sapiens population was 25 to 100 times that of the Neanderthal population, and there was total hybridization, would equally explain the current genetic observations.
Aagcobb · 10 May 2010
raven · 10 May 2010
stevaroni · 10 May 2010
DS · 10 May 2010
Matt Young · 10 May 2010
raven · 10 May 2010
John Vanko · 10 May 2010
Ever notice the similarity of characteristics between AIG and the Taliban? (Speech, tactics, insistence on inerrancy [they are the judge of what's inerrant and what's not; they will interpret the Bible for me], need for indoctrination in schools, fighting Satan)
Scary, isn't it?
Natman · 10 May 2010
John Kwok · 10 May 2010
TomS · 10 May 2010
Stanton · 10 May 2010
Jesse · 10 May 2010
raven · 10 May 2010
Jesse · 10 May 2010
stevaroni · 10 May 2010
Jesse · 10 May 2010
Diogenes · 10 May 2010
Thanks to Andrew Stallard for trying to explain why Biblical literalists think this way. Of course, Glenn Morton is another ex-YEC, helpful in understanging them. Still, I can't entirely understand the *why*.
Andrew Stallard tells us that they believe in objective reality. OK... so then *why* do they lie? *Why* are they so willing to ignore truckloads of data? Does data mean nothing to them?
*Why* did Duane Gish lie about the protein that was more similar between humans vs. bullfrogs, than between humans vs. chimps? *Why* after copying the fake "monkey quote" (about how Java Man/Homo erectus was "monkey-like") and then getting caught, *why* could he not just admit that Homo erectus is not monkey-like at all? Would it kill Gish to admit he was wrong?
*Why* did Henry Morris lie in his infamous misquote of Ross and Rezak re: Lewis Overthrust (where he dropped the "millions" out of "million years" and made other ridiculous changes of meaning)?
*Why* did William Dembski repeatedly claim that his probability calculations in "No Free Lunch" were probabilities of evolutionary processes--when they were calculations of totally random combinations of amino acids? And he absolutely knows those numbers differ by hundreds of orders of magnitude.
Why? My theory:
Scientists are "bottom up." Get every little fact straight. Build your small theories from those facts, build your big theories from small confirmed theories and more facts. Then, and only then, decide how you feel about it. Is it wondrous or terrifying that space is so vast and empty and full of galaxies? Decide that only *after* you get every small detail right.
Creationists are "top down." First, begin with a feeling: moral and economic terror. If there's no micromanager God providing us with a literally-correct Bible, then we can't tell what's right and wrong. Then the "rational" thing to do is to go about a-killing and a-raping each other. This is scary, therefore there must be a micromanager God providing us with a literally-correct Bible. Facts? Data? Experimental results? All those small data points are unimportant, pick-n-choose them only according to whether it will help relieve the emotional state you started out with: moral and economic terror.
Am I right or wrong about this?
Of course, creationists flip it and say evolutionists are "top down": evolutionists start out assuming there's no God so... blah blah.
Aagcobb · 10 May 2010
Gary · 10 May 2010
Well well,
I am not a biologist or a geneticist, and I misspoke. I do recall reading about neanderthals having 24 pairs of chromosomes, but I have no idea where the source was. I also thought it would be simple to determine when we examined samples of DNA. Guess they still have not determined this yet?
As for neanderthals being closer to chimps than us, I would assume that humans and neanderthals have the same latest common ancestor with chimps, so the divergence would be about the same. Perhaps our DNA from 30,000 years ago had the same divergence from chimps as the 30,000 year old neanderthal fossils we found, but current human DNA has a little more divergence because of 30,000 more years of mutations.
raven · 10 May 2010
Vaughn · 10 May 2010
Vaughn · 10 May 2010
DS · 10 May 2010
The reference I was referring to was this one:
Cell 134(3):416-417 (2008)
It shows pairwise comparisons between humans, Chimps and Neanderthals for the entire mitochondrial genome. It shows that humans and chimps have on average about 1,500 differences while Neanderthals and humans have on average about 200 differences. The human Neanderthal comparison is outside the range of human variation.
I was also referring to Figure 2 in the first Science paper which shows that Neanderthals are genetically distinct from modern humans and intermediate between humans and Chimps.
Thanks to Vaughn for the reference.
As for the chromosome number, yes, it seems like it should be easy to determine this based on the entire sequence. But, as Vaughn points out, this type of data might still leave some unanswered questions. I cannot find any definitive statement about this, but I have not read all of the papers yet. One would certainly presume that Neanderthals have the fusion, but either way it should prove to be very interesting.
raven · 10 May 2010
Henry J · 10 May 2010
amyc · 11 May 2010
amyc · 11 May 2010
amyc · 11 May 2010
Diogenes · 11 May 2010
TomS · 11 May 2010
Ecclesiastes 7:10 Do not ask why the old days were better than the present; for
that is a foolish question
raven · 11 May 2010
utidjian · 11 May 2010
Vaughn · 11 May 2010
Mike Elzinga · 11 May 2010
raven · 11 May 2010
John Kwok · 11 May 2010
John Kwok · 11 May 2010
Aagcobb · 11 May 2010
snaxalotl · 12 May 2010
it's understood that the civilians lie inadvertently; they don't know what's true and they aren't exactly encouraged to develop the thinking skills to work it out.
in the case of people who should know better, it's noteworthy that lying carries different moral values for the two sides in this case. it was previously mentioned that creationist belief is top down. in a bottom up system, true statements are links in a theoretical structure, and a mistaken fact poisons the whole structure and the conclusions. so in the science world,it's rather disgraceful to risk being mistaken. but in the top down world, a wrong claim might still be performing the honorable function of convincing people of the truth. a trial and error approach is ok because you're searching for anything that sticks ... it's the (moral) responsibility of the "complainers" to cut away arguments that don't work.
hoary puccoon · 12 May 2010
I don't think the human-bullfrog thing started out as a lie. I think there really was a very early study where bullfrog DNA was contaminated by DNA from one of the research team. But the scientists corrected the mistake at least a quarter of a century ago.
Somehow the creationists can convince themselves they're not "really" lying if they quote something a biologist or paleontologist said once--no matter how far the statement is from current scientific thought.
raven · 12 May 2010
Robert Byers · 14 May 2010
Robert Byers · 14 May 2010
Dave Luckett · 14 May 2010
Here it is the wee small hours of the morning over most of Canada, and here's Byers, regurgitating nonsense again. Do the voices in his head keep him awake, or something?
John Kwok · 14 May 2010