PERU: The mystery of the chromosome that separated us from the Neanderthals – EntornoInteligente

Peru Trade / Follow @tecnoycienciaEC “We found the Y chromosome neandertal in any of the samples analyzed,” said Peruvian scientist Carlos Bustamante, co-author of the research. “That does not prove that the chromosome has been totally extinguished, but it probably is,” he added.

enigmatic Mestizaje

Our ancestors and Neanderthals interbred approximately 50,000 years after Homo sapiens left his native Africa and began to colonize Eurasia. And there is still a small amount of DNA in our genes that is the legacy of that miscegenation.

The researchers say it is possible that chromosome initially circulated in the genetic code of modern humans, but lost, random, over the millennia.

Another possibility is that chromosome genes that are incompatible with other genes of Homo sapiens. And indeed, the scientists found evidence supporting the latter theory.

genetic Incompatibilities

Some of the Y chromosome genes of Neanderthals are part of the immune system.

Three of them are minor histocompatibility antigens, or genes HY, which resemble those transplant surgeons checked to ensure that donors and organ recipients have immune profiles similar.

in theory, the immune system of women can attack a male fetus have some of those Neandertal genes.

And if miscarriages of babies carrying these chromosomes are produced consistently, that would explain its absence in the genetic code of modern humans.

“the functional nature of the mutations that we found suggests that the Y chromosome sequences Neanderthals may have played a role in mating ancient humans and Neanderthals” expicó Bustamante. “We need to do more experiments to prove it and we’re working on it,” he said. But, for now, the mystery will remain unsolved.

PERU: The mystery of the chromosome that separated us from the Neanderthals

Information Trade Perú

http://entornointeligente.com/articulo/8227405/PERU-El-misterio-del-cromosoma-que-nos-separo-de-los-neandertales

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