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hist of mankind from genetics

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2017 at 04:04
Originally posted by toyomotor toyomotor wrote:

From [quote]http://factsanddetails.com/world/cat56/sub360/item1481.html

 And here I sit, a phenotypically European male, fair skin, blue eyes and brown hair, but with the D2 Haplogroup, relating to my earliest ancestor. My personal DNA has also travelled around Europe, Scandinavia and the British Isles.

The details of that voyage would be incredible.

That is incredible, before you knew about the D2 heritage, did you have an affinity for any of the groups you might be related to?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2017 at 08:07
Vanuatu:-

In a recent post, I referred you to an article published in The Australian Newspaper.

You weren't able to access that site, I've copied the article for your perusal.

From The Australian Newspaper Feb. 24th 2017.
Quote

Neanderthal ancestors still influencing us through our genes

Higher Education reporter
Sydney

They are dissed as grunting phil­istines with sloping foreheads and no necks, yet Neanderthals are still having their say, through our DNA.

Seattle researchers have thrown new light on the mechan­isms that enable genetic material passed on from Neanderthals to affect many of us, influencing traits such as height and susceptib­ility to diseases such as schizophrenia and lupus.

“Neanderthal-inherited sequen­ces are not silent remnants of ancient interbreeding,” the scientists report this morning in the journal Cell.

“(They) have measurable impacts­ on gene expression that contribute to variation in modern human phenotypes.”

While Neanderthals are thought to have died out about 40,000 years ago, their DNA comprises about 2 per cent of the genomes of most modern hum­ans.

Neanderthal genetic variants have been linked with vulnerability to conditions ranging from depression and nicotine addiction to precancerous skin lesions and excessive blood clotting.

However, scientists have struggled to decipher the mechan­isms by which Neanderthal genes continue to affect us. While genetic instructions can be extracted from Neanderthal fossils — in fact, the entire Neanderthal genome was sequenced in 2010 — scientists cannot recover the RNA that helped transmit this genetic information.

It is therefore not clear whether Neanderthal genes functioned in the same way as their modern human counterparts.

To answer this question, the researchers mined a genetic database and associated tissue bank called the Genotype-Tissue Expressio­n Project.

They looked for people who carried both Neanderthal and modern human versions of particular genes, with one of these “alleles” inherited from each parent.

For each such gene, the scientists compared how the two ­alleles functioned in 52 different tissues.

Lead author Rajiv McCoy, from the University of Washington, said they behaved differently in about one-quarter of the sites tested.

Co-author Joshua Akey, who helped last year to identify 12 Neande­rthal genes linked with increased risk of significant diseases, said the new study showed that Neanderthal DNA sequences still affected how genes were turned on or off in modern human­s.

“Even 50,000 years after the last human-Neanderthal mating, we can still see measurable impacts­ on gene expression,” Professor Akey said.

“Those little bits and pieces, our Neanderthal relics, are influencing gene expression in pervasive­ and important ways.”

One example was the Nean­derthal version of the “ADAMTSL3” gene, which is associated with height and schizophrenia.

The team found that a single mutation from a Neanderthal ancest­or could increase the risk of schizophrenia by affecting “messenger RNA” involved in protein production.




Edited by toyomotor - 02 Mar 2017 at 08:10
It's not that I was born in Ireland,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2017 at 12:57
Some experts have linked the movement of DNA to what they call cultural movements, two of these are the Corded Ware Cultures (c. 2900 BCE – circa 2350 BCE, ) and the Bell Beaker Culture (ca. 2800 – 1800BC,) 

These originated on the Asiatic Steppes region and were allegedly moving around Europe bringing the Asiatic Stepppe DNA with them.

I don't really subscribe to that view. The Corded Ware and Bell Beakers were types of pottery in use during the periods mentioned above, and traces of which have been found throughout parts of Europe.

My view is that, before the Silk Road trade route reached it's peak, (Around 120 BCE – 1450s CE), trade  was being conducted from far away places, like the Asiatic Steppe to Western Europe. I favour the idea that the pottery types were either copied by women who had travelled to the Steppes with their husbands/fathers on trading trips, or the "technology" was taken to Central and Western Europe by young women who had either married or been enslaved by European traders.

I don't see that the actual "culture" of the steppe people, and their DNA, was necessarily travelling around Europe, just the know how to make these two well documented types of pottery.

I've not found any references which categorically argues against my views.




 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2017 at 00:33
I think you mean Genghis Kahn, not Attila the Hun.  You might check.
Kings had first rights, so to speak, and Kahn 'spread' his genes through rape.
There are other populations that have a high representation of one particular
male (a king) in the genes.  I'm not saying it is right, I am just saying
that that is probably what happened.  Again, men got the sword, and
women got pregnant.

There was an article a long time ago in Discover which said that men had
to stick around, because women's fertility is not obvious.  If you have a 
dog in heat, you know when the bitch is fertile (especially if you are another
dog), and so for the male dog, you don't need to be around all the time.
Women's fertility is more secret, and so you need to stick around to 
make sure you are the father.  Unless you are the king and going for
quantity. With father's sticking around, you get culture.

You may have already said, but are the Neanderthal genes primarily in
the male line, or the female line, or can they tell?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2017 at 04:51
Originally posted by Vanuatu Vanuatu wrote:

Originally posted by toyomotor toyomotor wrote:

From [quote]http://factsanddetails.com/world/cat56/sub360/item1481.html

 And here I sit, a phenotypically European male, fair skin, blue eyes and brown hair, but with the D2 Haplogroup, relating to my earliest ancestor. My personal DNA has also travelled around Europe, Scandinavia and the British Isles.

The details of that voyage would be incredible.

That is incredible, before you knew about the D2 heritage, did you have an affinity for any of the groups you might be related to?



My maternal bloodline is Irish, but my mother's DNA goes way back to Eastern Europe.

When I received my YDNA results, I was pretty much stunned.

I've had an affinity for Ireland and the Irish for quite some years.


It's not that I was born in Ireland,
It's the Ireland that was born in me.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2017 at 04:58
Originally posted by franciscosan franciscosan wrote:

I think you mean Genghis Kahn, not Attila the Hun.  You might check.
Kings had first rights, so to speak, and Kahn 'spread' his genes through rape.
There are other populations that have a high representation of one particular
male (a king) in the genes.  I'm not saying it is right, I am just saying
that that is probably what happened.  Again, men got the sword, and
women got pregnant.

There was an article a long time ago in Discover which said that men had
to stick around, because women's fertility is not obvious.  If you have a 
dog in heat, you know when the bitch is fertile (especially if you are another
dog), and so for the male dog, you don't need to be around all the time.
Women's fertility is more secret, and so you need to stick around to 
make sure you are the father.  Unless you are the king and going for
quantity. With father's sticking around, you get culture.

You may have already said, but are the Neanderthal genes primarily in
the male line, or the female line, or can they tell?

franciscosan:

I'm a bit perplexed as to what you're talking about or to whom you are addressing this post.

If you're replying to me, I've never mentioned Attila, nor, from memory did I mention Genghis Khan,per se, just the fact that he founded the greatest contiguous empire the world has seen etc.

But if you think that having raped, ancient men hung around to reap the result, I think you've lost the plot.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2017 at 06:37
Quote You may have already said, but are the Neanderthal genes primarily in
the male line, or the female line, or can they tell?

I know that some of the artifacts were female in origin, but, I think the majority have been male.

Geneticists can certainly determine the sex of the person who carried the genes, in some cases they can even tell approximately where they lived and what they ate.

http://dienekes.blogspot.com.au/ is a good place to look for this type of information.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2017 at 14:33
francisosan.

Quote But if you think that having raped, ancient men hung around to reap the result, I think you've lost the plot

I apologise for that comment, it was rude of me and I didn't mean to offend you, it's just that sometimes I have great difficulty understanding what you really mean.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 01:34
yes Genghis Kahn, Shocked

no mitochondrial neanderthal DNA 
The root of all desires is the one desire: to come home, to be at peace. -Jean Klein
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 06:11
Originally posted by Vanuatu Vanuatu wrote:

yes Genghis Kahn, Shocked

no mitochondrial neanderthal DNA 

Sorry, you've lost me.

I don't understand what you have written.  Question
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Post Options Post Options   Thanks (0) Thanks(0)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 02:47
There are millions who have Genghis Kahn as an ancestor (not Attila the Hun).

I was asking if they knew if it was male or female neanderthals, from which the neanderthal DNA comes from.  So Vanuatu said, no mitochondrial neanderthal DNA.  (I believe mitochondrial comes from the mother...?)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 03:32
The mitochondrial DNA from Neanderthal does not resemble DNA in the mtDNA of people living today. Or from ancient Homo Sapiens.

All they have so far are the mutations that link our species to Neanderthal occurring 500,000 years ago. That suggests but doesn't prove that Neanderthal didn't contribute to our gene pool.
 

Researchers have also studied ancient DNA from anatomically modern Homo sapiens from Europe dating to the same time period as the Neanderthals. Material from two Paglicci Cave, Italy individuals, dated to 23,000 and 25,000 years old, was sequenced. The Paglicci Homo sapiens mtDNA sequences were different from all Neanderthal mtDNA sequences but were within the range of variation for modern human mtDNA sequences (Caramelli et al. 2003). Mitochondrial DNA from the Paglicci specimens as well as other ancient humans fit within the range of modern humans, but the Neanderthals remain consistently genetically distinct. This shows that early anatomically modern Homo sapiens were not very different genetically from current modern humans, but were still different from Neanderthals. Though this evidence does not disprove the idea of Neanderthal and modern human admixture, it shows that moderns and Neanderthals did not have more genetic similarities during the Pleistocene that were subsequently lost. If interbreeding did occur, Neanderthal mtDNA sequences could have been lost due to genetic drift.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 05:15
Originally posted by franciscosan franciscosan wrote:

There are millions who have Genghis Kahn as an ancestor (not Attila the Hun).

I was asking if they knew if it was male or female neanderthals, from which the neanderthal DNA comes from.  So Vanuatu said, no mitochondrial neanderthal DNA.  (I believe mitochondrial comes from the mother...?)

Yes, you're quite correct. Millions of men show Genghis Kahn DNA(Traces).

I'm not sure of Vanuatu's quote is up to date.

See http://dienekes.blogspot.com.au/2011/08/no-evidence-for-neandertal-admixture.html

Neanderthal MtDNA has been extracted, and shown to be not present in modern humans.

See http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.0020057

Quote The retrieval of mitochondrial DNA (mtDNA) sequences from four Neandertal fossils from Germany, Russia, and Croatia has demonstrated that these individuals carried closely related mtDNAs that are not found among current humans. However, these results do not definitively resolve the question of a possible Neandertal contribution to the gene pool of modern humans since such a contribution might have been erased by genetic drift or by the continuous influx of modern human DNA into the Neandertal gene pool. A further concern is that if some Neandertals carried mtDNA sequences similar to contemporaneous humans, such sequences may be erroneously regarded as modern contaminations when retrieved from fossils. Here we address these issues by the analysis of 24 Neandertal and 40 early modern human remains. The biomolecular preservation of four Neandertals and of five early modern humans was good enough to suggest the preservation of DNA. All four Neandertals yielded mtDNA sequences similar to those previously determined from Neandertal individuals, whereas none of the five early modern humans contained such mtDNA sequences. In combination with current mtDNA data, this excludes any large genetic contribution by Neandertals to early modern humans, but does not rule out the possibility of a smaller contribution.

See also https://en.wikipedia.org/wiki/Archaic_human_admixture_with_modern_humans
Quote Through whole-genome sequencing, a 2010 draft sequence of the Neanderthal genome revealed that Neanderthals shared more alleles with Eurasian populations (e.g. French, Han Chinese, and Papua New Guinean) than with Sub-Saharan African populations (e.g. Yoruba and San).[2] According to the study, the observed excess of genetic similarity is best explained by recent gene flow from Neanderthals to modern humans after the migration out of Africa.[2] The proportion of Neanderthal-derived ancestry was estimated to be 1–4% of the Eurasian genome.[2] In 2013, the same team of researchers revised the proportion to an estimated 1.5–2.1%.[3] They also found that the Neanderthal component in non-African modern humans was more related to the Mezmaiskaya Neanderthal (Caucasus) than to the Altai Neanderthal (Siberia) or the Vindija Neanderthals (Croatia).[3] Analyzing the genomes of Europeans and East Asians, it has been found that about 20% of the Neanderthal genome is still present in the modern human population.[4]

So, while there is no similarity with the modern MtDNA, obviously MtDNA has been extracted from ancient artifacts.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 05:21
Yes and in the first sentence of the post if you notice the lack of similarity with humans today is mentioned.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 05:36
Originally posted by Vanuatu Vanuatu wrote:

Yes and in the first sentence of the post if you notice the lack of similarity with humans today is mentioned.

Yes, you're quite correct, and I didn't mean to infer that you'd claimed otherwise.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 14:34

Ancient Aliens TV series, (Origins of Man) asks why we homo sapien sapien would loose body hair when we needed animal skins and fur to survive after losing it? And how would it be a successful adaptation if man wasn't changed at the level of DNA by aliens? If he didn't know about fire and tool making he'd be at peril (Naked Ape). The Sumerians had the Annunaki -being creators of man, giving language to man. Lots of other myths with sky gods giving man language.
http://www.annunaki.org/sumerian-aliens/

It is possible now to edit human DNA, no human trials but accepted as possible. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 06 Mar 2017 at 20:27
damn aliens!  First  they take our jobs, then they edit our DNA!
<grin>
Just wait until President Trump hears this!

If they did edit our DNA, I don't think they did a good job.

DNA is a TLA.  Does anyone know what DNA stands for, 
without looking it up?  I vote for leaving it alone, unless 
we know what we are doing (which for humans seems to
be hardly ever.)

IF humans were founded by aliens, then where do the aliens
come from?  Biologically speaking.  I mean just saying that
aliens did it just adds another level of complication to the mix.
We might not now have to explain how _we_ got language,
but then we have to explain how aliens got language.  With
us however, we have information whereas for aliens (who are
not wetbacks), we have nothing but suppositions.  And if
we are going to a previous step, why don't we make the
ultimate step and say the big G did it?  Cut out the middle
men, or BEMs as the case may be (Bug Eyed Monsters). 

The difference between conservatives and liberals is:
Liberals say, if we don't know why it is there, get rid of it.
Whereas Conservatives say, if we don't know why it is there, leave it alone.
To edit or not to edit, that is the question? 
Hippocrates says do no harm.  (Hippocratic Oath)


Edited by franciscosan - 06 Mar 2017 at 20:42
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 03:24
Originally posted by franciscosan franciscosan wrote:

damn aliens!  First  they take our jobs, then they edit our DNA!
<grin>
Just wait until President Trump hears this!

If they did edit our DNA, I don't think they did a good job.

DNA is a TLA.  Does anyone know what DNA stands for, 
without looking it up?  I vote for leaving it alone, unless 
we know what we are doing (which for humans seems to
be hardly ever.)

IF humans were founded by aliens, then where do the aliens
come from?  Biologically speaking.  I mean just saying that
aliens did it just adds another level of complication to the mix.
We might not now have to explain how _we_ got language,
but then we have to explain how aliens got language.  With
us however, we have information whereas for aliens (who are
not wetbacks), we have nothing but suppositions.  And if
we are going to a previous step, why don't we make the
ultimate step and say the big G did it?  Cut out the middle
men, or BEMs as the case may be (Bug Eyed Monsters). 

The difference between conservatives and liberals is:
Liberals say, if we don't know why it is there, get rid of it.
Whereas Conservatives say, if we don't know why it is there, leave it alone.
To edit or not to edit, that is the question? 
Hippocrates says do no harm.  (Hippocratic Oath)

Yea I'll have the last laugh in my tinfoil hat.Cool 
Deoxyribonucleic acid. Genetically engineered by aliens, editing the fetus creating breeding pairs. The offspring still breed with the various other types of hominids "original sin." God /aliens flood the earth but save Noah, to keep the experiment going.

Oh and the DNA editing today is about parents wanting their fetus to be altered for height, hair/ eye color.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 03:34
Oh, I'd be very careful of what you say and write you two.

You never know who may be listening, and they may not take kindly to you dismissing them so easily.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 03:49
To add a little fuel to our discussion, the following comes from http://www.ancient-origins.net/news-evolution-human-origins/ancient-skulls-found-china-could-belong-unidentified-human-species-021256

Quote

Ancient Skulls Found in China Could Belong to an Unidentified Human Species
6 MARCH, 2017 - 13:46 THEODOROS KARASAVVAS

Ancient Skulls Found in China Could Belong to an Unidentified Human Species

(Read the article on one page)

A team of scientists has discovered two partial human skulls in central China that could possibly belong to an unspecified archaic human species. The skulls are 105,000 to 125,000 years old, and they carry a distinctive blend of contemporary human and Neanderthal features. The skulls were found during excavations at Lingjing, Xuchang County in Henan Province, between 2007 and 2014.

Read the remainder of this report at the above link.

It seems that there is a new twist every month or so.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 04:37
There could have been civilizations before the Etruscans and Assyrians, suddenly gone bc of earth quakes, conquest, slavery. Technology and culture left behind.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 04:50
Originally posted by Vanuatu Vanuatu wrote:

There could have been civilizations before the Etruscans and Assyrians, suddenly gone bc of earth quakes, conquest, slavery. Technology and culture left behind.

I would have thought that there probably was, but this article touches on the admixture of Human YDNA, and the possibility/probability that apart from Home Sapien, Neanderthal and Denisovan cross breeding, there was yet another people who were or could have been involved.

As technology gains new footholds, it's possible that other species will be found to have bred with some or all of the above.

Homo Sapien Sapiens came out of Africa, but whom did they encounter on their travels?


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Post Options Post Options   Thanks (1) Thanks(1)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 22:54
I have heard the if you breed a horse and jack-ass you get a democrat?
It is bad enough that we mess with Frankenfood, although there are reasons
why that is convenient.  Now we feel like we have to mess around with
the genome.  I suggest the movie Gattaca.

It is interesting that man, and a few animals domesticated by him are
able to run distances.  Most animals cannot really do anything more than
a sprint.  Horses can, and dogs can, having been conditioned to run long
distances.  But it is an interesting question which traits, (distance, hair loss
for main body, language, tool use) which came first and what came
after that.  I imagine descent from the trees, and development of hands were
early.
Of course, aliens could take care of that easy, problem is how do explain the 
aliens?  I think that there are no aliens, but are us time traveling back from the
far future.  We will be the aliens of the future, and of the past.  But _iff_ there
is anyone good enough to do time travel, they would also be good enough to
hide their tracks.  So it is not like that we will ever catch them with their pants
down, because if they do time travel, probability travel, they can change 
things before hand, after the fact.  But "aliens" is not a good way of explaining
_anything_, because aliens explains _everything_.  I lost my carkeys, aliens
must have done it!  So where are they?  Where do I look?  I dunno....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 08 Mar 2017 at 04:07
I think geneticists and other medical scientists are between a rock and a hard place.

It's possible to detect some future diseases in humans, such as Cancer, through examination of certain genes. If this was performed in vitro, and that gene deliberately altered so that the disease/illness could never occur, it would add to the life span of human beings. But at what expense?

The world is facing a food crisis within the next hundred years or so, due to overpopulation and natural events. To add to the overpopulation by genetically altered humans would raise heated debate on the matter. 

Are we about to breed ourselves into oblivion?

As to aliens, as I've written ad nauseum, I personally won't rule them in or out, I simply don't know.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 08 Mar 2017 at 23:41
Water is the next crisis, it is the crisis now but much like a mortgage bubble this just hasn't burst yet.

Some fitness experts say that humans should live to be 120 years old. If we didn't kill ourselves with food additives and pharmaceuticals. Also have the corn conspiracy where the chemicals being sprayed will de-sex us over time. We will have great swaths of non reproducing jack-asses.

No evolutionary reason for us to lose fur AND survive unless we were smart enough to cover up. 
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Post Options Post Options   Thanks (1) Thanks(1)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2017 at 08:57
Yes, if we all lived pure healthy lives, shunning all of those foodstuffs which are bad for us, but are heaven to the taste, and if we exercised regularly and looked after our bodies-no TV, no movies, we would all live long boring miserable lives.

About the only pleasure left for most of us would be the occasional indoor gymnastics. Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 13 Mar 2017 at 01:13
A friend pointed out that human skin is attached to the muscle, whereas animal skin (for example dog) have loose skin, but I am not sure what the evolutionary advantage is, nor whether other animals (vertebrates) have this attachment between skin and muscle also, (dolphin, water creatures?).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toyomotor Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 2017 at 11:41
Originally posted by franciscosan franciscosan wrote:

A friend pointed out that human skin is attached to the muscle, whereas animal skin (for example dog) have loose skin, but I am not sure what the evolutionary advantage is, nor whether other animals (vertebrates) have this attachment between skin and muscle also, (dolphin, water creatures?).

Yes, but this doesn't get to the heart of the OP.

There are many authoratative articles on the internet about genetics and human history/development.

I'd really like to know more about the cross breeding that took place between Homo Sapiens Sapiens, Neanderthals, Denisovand, and any other species or sub-species of man, such as Heildelbergensis, Peking Man and so on.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote franciscosan Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 2017 at 20:52
It is a tangential, think of it as "genetic drift."   'if you get my drift...Rolling on the floor'
but seriously, if you can tighten it up and bring it more to the point, do so.
However, I do wonder why man's skin is tight, and animal's skin is loose, what kind of environs, natural or manmade influenced evolution to create it that way.

It is not really genetics, but it is part of the natural history of mankind.  Some kind of forces introduced this change into the human makeup, and I am sure there is an evolutionary (genetic) response.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Vanuatu Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 2017 at 22:46
If a dog is bitten by another dog he won't necessarily be immobilized. The dog can still potentially swing around to bite even if he is bitten at the neck. Loose skin is for hunters like the sharpei, hounds, wolves too.
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