How racist are you

[bi0boy]

ern?

 

[Louloubelle]

According to the most recent DNA testing African people are the only true Homo sapiens. The rest of us have ancestors who, at some time or another, interbred with now extinct Neanderthals or Denisovans. All non-African humans have some Neanderthal DNA. The indigenous people of PNG have Denisovan DNA as do Australian aboriginal people and some East Asian populations.

It is a very exciting time for anyone interested in the evolution of modern humans as new DNA is being extracted from bone fragments all the time and genetic analysis is providing detailed information about our human ancestors that sheds light on some genetically inherited auto-immune diseases.

http://www.telegraph.co.uk/science/evolution/9094411/The-Hobbit-who-helped-us-find-our-origins.html
http://www.guardian.co.uk/science/blog/2011/aug/25/neanderthal-denisovan-genes-human-immunity
http://www.medicalnewstoday.com/articles/241801.php

Just wanted to share

as you were

 

[tendril]

According to the most recent DNA testing African people are the only true Homo sapiens. The rest of us have ancestors who, at some time or another, interbred with now extinct Neanderthals or Denisovans. All non-African humans have some Neanderthal DNA. The indigenous people of PNG have Denisovan DNA as do Australian aboriginal people and some East Asian populations.

It is a very exciting time for anyone interested in the evolution of modern humans as new DNA is being extracted from bone fragments all the time and genetic analysis is providing detailed information about our human ancestors that sheds light on some genetically inherited auto-immune diseases.

http://www.telegraph.co.uk/science/evolution/9094411/The-Hobbit-who-helped-us-find-our-origins.html
http://www.guardian.co.uk/science/blog/2011/aug/25/neanderthal-denisovan-genes-human-immunity
http://www.medicalnewstoday.com/articles/241801.php

Just wanted to share

as you were

Yeah, I was wondering about that. I knew that Homo Sapiens had spread out from Africa (or the land mass that was to become Africa, not sure of the timescale of plate tectonics v human evolution) and that they most likely had interbred with Neanderthal. Didn't know about Denisovan. Still, we all share enough common DNA with all other humans to be tissue and blood compatible. What I do wonder though is why the Homo Sapian/Neanderthal mix of DNA is not physically stronger than pure Homo Sapien, given that we know Neanderthal people to be of a more robust build and are generally accepted to have been stronger than modern humans (wiki article)

 

[Louloubelle]

Yeah, I was wondering about that. I knew that Homo Sapiens had spread out from Africa (or the land mass that was to become Africa, not sure of the timescale of plate tectonics v human evolution) and that they most likely had interbred with Neanderthal. Didn't know about Denisovan. Still, we all share enough common DNA with all other humans to be tissue and blood compatible. What I do wonder though is why the Homo Sapian/Neanderthal mix of DNA is not physically stronger than pure Homo Sapien, given that we know Neanderthal people to be of a more robust build and are generally accepted to have been stronger than modern humans (wiki article)

According to the news reports I have read there was probably an initial genetic advantage to the Homo Sapiens breeding with Neanderthals as the Neanderthals had greater immunity to pathogens they had been exposed to over millennia that the Homo Sapiens had not, and thus this advantage was passed on. The disadvantage is that, while the 2 subspecies were sufficiently genetically similar to be able to reproduce and produce healthy offspring, the Neanderthal genes may have been sufficiently alien to trigger an immune response, thus the body starts to attack itself as happens in autoimmune diseases such as rheumatoid arthritis and lupus.

Just my understanding of it, I am not a geneticist so my understanding may be flawed

 

[Superdupastupor]

. What I do wonder though is why the Homo Sapian/Neanderthal mix of DNA is not physically stronger than pure Homo Sapien, given that we know Neanderthal people to be of a more robust build and are generally accepted to have been stronger than modern humans (wiki article)

I think it's not many generations of side by side interbreeding. I think the understanding is that the neaderthal influence wouldve been sporadic quickly becoming 'onedrop' ancestry to use slightly iffy language.

 

[Mrs Magpie]

Well, possibly not interbreeding at all, according to this..
http://www.bbc.co.uk/news/science-environment-19250778