Aye where do I begin? ……………… So I have a friend who had her DNA tested by one of the many labs now testing ancestry DNA and yesterday she got her results which she found very disappointing. She paid almost $200 for the analysis. Why so expensive? Because the lab she chose said for an extra charge they could sequence her DNA from “prehistoric humans.” I assumed they meant Neanderthal DNA but she assumed they meant……well come to find out…..she thought they could sequence her “handyman” DNA (Homo habilis)!!
Before she even paid the charge I told her that it is impossible for any lab to sequence H. habilis DNA (whom she refers to as the “monkey people) because we don’t have any viable DNA from that species with which to compare to. But she wouldn’t listen. She was sure they could do it. I told her that the only possible analysis they could do was related to the percentage of Neanderthal DNA in her genes and that would not be more than 4%. But she wouldn’t listen and went right ahead and paid the extra charge to have her “monkey people” DNA analyzed along with her ancestry. Hate to say it but “I told you so.”
As I mentioned, yesterday she got her DNA results and they were NOT what she expected at all. She has thought herself to be primarily “American and Mexican Indian.” I have questioned her about this as she doesn’t even remotely look like either. Her results showed that in fact she is mainly South American likely from the areas of Ecuador and Peru. That’s exactly what I told her the results would reveal as she looks very much like the native people in the highlands of those areas. Her results also showed that she had a percentage of Sephardi Jew in her which she found “very shocking” as she had no idea. Then came the results of the “monkey people” DNA. Continue Reading
Evolution has worked to improve the genetic foundations of our health for millions of years now but new research suggests that things may be reversing and that might spell bad news for modern humans in the modern world. The study was conducted by the Georgia Institute of Technology recently.
Human evolution has worked to weed out genetic variants that are associated with diseases and it’s worked to promote variants that protect us against certain diseases according to this new study which was a comparative genetics study. However, for some odd reason over the past 500 to 1000 years it appears things have reversed. For example, the study has concluded that cardiovascular problems were much more common in our ancient human ancestors than they are today. What this means is that some diseases may be on the rise in modern humans and especially in terms of mental health.
Large populations are better able to purge disease causing gene variants and today with the human population near 7 billion people that is happening but still for some reason it appears this trend has been reversing over the past 500-1000 years. The study also found that Neanderthals and Denisovans had a lot more alleles (genetic variants) that promoted disease than we do today including heart disease. Over the course of time things got better and the variants for such widespread diseases were apparently weeded out as protective alleles rose. Continue Reading
The DNA within us is like a fingerprint in that each person’s particular combination of DNA is unique.But, unlike fingerprints, your DNA was passed down to you by your ancestors and it is RANDOM not uniform. We get about half of our DNA from our fathers and half from our mothers. They, in turn, got their DNA from their parents, who got it from theirs, and so on. While the particular combination inherited from a single set of parents makes each person unique, the shared genetic details of family members are what link you back to people born throughout history.
In the above example you might get a DNA combination of ADFH!
Autosomal DNA tests, unlike Y- or mtDNA tests, survey a person’s entire genome at over 700,000 locations where genetic markers that identify an individual typically appear. Plus, autosomal DNA tests look at both maternal and paternal lines, meaning discoveries come from both sides of your family tree. In the past, DNA tests looked at only a few dozen DNA sequences on either the Y chromosome or mitochondrial DNA. Because only men carry the Y chromosome, only men could take a Y-DNA test. As a result, Y-DNA test results would follow just the males in a single paternal line — fathers and sons. Mitochondrial DNA (mtDNA) tests, on the other hand, could be taken by anyone. But the test results traced only an all-female line moving from mother to grandmother to great-grandmother, and so on. MtDNA tests could tell you more about your ancient ancestry, like where your family originated tens of thousands of years ago, but not who your cousins were. Continue Reading
H/T to JR Bentley for sending us this research article………..
It would be an understatement to say that there are problems with the Out-of-Africa (OOA) theory and finally new research and reanalysis of prior research is attempting to correct some of those problems but what is being found is that the OOA may be absolutely WRONG to begin with. This becomes especially obvious when genetic evidence is looked at. In fact, WORLD science is now leaving the OOA theory behind and a Chinese research team is advancing an out-of-ASIA theory for modern human origins based on Y-DNA & mtDNA evidence and, thus, they are reviving the Multiregional Theory for human evolution based on autosomal evidence. The field of genetic research is becoming more precise and I think that is fantastic because it is now beginning to give us a new picture of human evolution and migration patterns!! Finally, we are getting some real concrete proof of what was and what was NOT.
The latest research by Chinese geneticists suggests that about 2 mya the first split occurred in modern human autosomes. Further, they’ve uncovered genetic evidence of Y and mtDNA having originated in East Asia and dispersing outward from East Asia via HYBRIDIZATION by archaic human ancestors!! This research strongly suggests a EURASIAN origin rather than an African origin for ancient human ancestors!! The primary research team is being led by Shi Huang who is a US educated and trained geneticist.
Huang’s research confirms genetic diversity is highest in Africans and lowest in Amerindians. His team also confirms Africans & Amerindians are genetically most divergent from each other. Africans are found to be closer to each other than they are to other groups and that New world sub-populations are more distinct from each other than other continental groups. Further, they’ve also found that Amerindians have the world’s highest values of intergroup diversity.
The findings of this research are currently under peer review and the team argues that African genetic diversity is NOT a function of greater age of African hominins but is a product of selection! This is supported by data showing increased African diversity in the study. Yuan uses autosomal molecular divergence dates as evidence for multiregional evolution. That date is derived from estimated molecular divergence between autosomes of major human groups to have taken place 1.96–1.91 mya which is consistent with paleobiological evidence for a Homo (human) migration out of Africa 2 myr. Continue Reading
A new look at archaic human DNA by the University of Utah has come to some interesting and “revolutionary” findings but sadly what they have found doesn’t fit at all with the status quo so it’s being ignored. However, I STRONGLY suspect that what the U of U has found is closer to the TRUTH in terms of the human evolution story than what we have now!
Using a new method for analyzing DNA sequence data researchers at the University of Utah have reconstructed the early history of archaic humans and it contradicts what we believe to be so for modern humans (H. sapiens), Neanderthals, and Denisovans. One thing they discovered quickly was that Neanderthal and Denisovan populations almost went extinct but 300 generations later the Neanderthal population grew to TENS OF THOUSANDS of individuals living in segregated populations, that is, they mainly lived apart from Denisovans and modern humans.
“This hypothesis is against conventional wisdom, but IT MAKES MORE SENSE that the conventional wisdom,” said Alan Rogers who is a professor of Anthropology and lead author of the study. And indeed it does!! The conventional wisdom holds the view that Neanderthal numbers were small when modern humans came upon the scene…somewhere around 1000 individuals. But this study shows that that number grossly underestimates the Neanderthal population at the time. The team calculated that Neanderthals and Denisovans separated around 744 kya which is much earlier than conventional wisdom holds. The study also questions the conventional wisdom that Neanderthal populations only amounted to about 1000 individuals and that the REAL Neanderthal population may have numbered in the tens of thousands!! Continue Reading