How modern humans and neanderthals have coexisted and shared ideas. A video by +Nature News & Comment
The research paper can be found here:
http://dx.doi.org/10.1038/nature13621
Skulls of early Homo erectus from the site of Dmanisi, Georgia, are all quite different
"Together with the fossilized bones of four additional individuals discovered in close proximity, the skulls indicates that populations of early Homo comprised a wider range of morphological variation than traditionally assumed, which implies a single evolving lineage with continuity across continents. "
So who knows, maybe H rudolfensis, H gautengensis, H ergaster and possibly H habilis are all H erectus! If true this would be a game changer as it could indicate that our predecessors at a specific time and place are way less similar to each other than was expected until now.
Read both papers in Science:
http://www.sciencemag.org/content/342/6156/297.short
http://www.sciencemag.org/content/342/6156/326.short
#science #paper #homosapiens #evolution #homoerectus #Dmanisi #palaeontology
I think for a paper like this it would be more interesting to see if the amount of mutations with a functional effect (coding or regulatory) is also increasing with age and with what rate this is happening.
Another great thing would be if they would actually sequence the same person with samples from each a different age and see the actual changes instead of the inferred mutations.
Paper: http://www.nature.com/nature/journal/v488/n7412/full/nature11396.html#/affil-auth
#paper
#genomics #genetics #sequencing #evolution
Originally shared by +Lorna Salgado
"Men in their 20s harbor about 25 random mutations, while a 40-year-old man has 65 mutations on average."
Scientists have found solid evidence that older men have more random mutations in their sperm cells. They're warning that can cause autism, schizophrenia and a long list of other genetic diseases in their offspring.
The new report, in the journal Nature, comes from deCODE Genetics, an Icelandic firm that studied the entire genomes of 78 families involving 219 individuals.
It's not the first time researchers have suggested the father's age is linked to increased genetic risk. The hypothesis goes back nearly a century. But the Icelandic researchers have shown that the father's contribution to genetic disorders is far higher than the mother's.
It makes sense. Men churn out around 200 million sperm a day, providing 200 million daily opportunities for spontaneous "point" mutations when genes get mis-copied. But once women reach puberty, they don't make new egg cells, so their rate of mutations – usually errors in chromosomes, or whole groups of genes – is fixed.
And sure enough, the new paper shows that the rate of new mutations rises steadily in men's germ cells – doubling every 16 1/2 years. Men in their 20s harbor about 25 random mutations, while a 40-year-old man has 65 mutations on average.
Kids Of Older Fathers Likelier To Have Genetic Ailments : NPR
Icelandic scientists have found solid evidence that older men have more random mutations in their sperm cells. They’re warning that can cause autism, schizophrenia and a long list of other genetic dis…
I think for a paper like this it would be more interesting to see if the amount of…
I think for a paper like this it would be more interesting to see if the amount of mutations with a functional effect (coding or regulatory) is also increasing with age and with what rate this is happening.
Another great thing would be if they would actually sequence the same person with samples from each a different age and see the actual changes instead of the inferred mutations.
Paper: http://www.nature.com/nature/journal/v488/n7412/full/nature11396.html#/affil-auth
#paper
#genomics #genetics #sequencing #evolution
Reshared post from +Lorna Salgado
"Men in their 20s harbor about 25 random mutations, while a 40-year-old man has 65 mutations on average."
Scientists have found solid evidence that older men have more random mutations in their sperm cells. They're warning that can cause autism, schizophrenia and a long list of other genetic diseases in their offspring.
The new report, in the journal Nature, comes from deCODE Genetics, an Icelandic firm that studied the entire genomes of 78 families involving 219 individuals.
It's not the first time researchers have suggested the father's age is linked to increased genetic risk. The hypothesis goes back nearly a century. But the Icelandic researchers have shown that the father's contribution to genetic disorders is far higher than the mother's.
It makes sense. Men churn out around 200 million sperm a day, providing 200 million daily opportunities for spontaneous "point" mutations when genes get mis-copied. But once women reach puberty, they don't make new egg cells, so their rate of mutations – usually errors in chromosomes, or whole groups of genes – is fixed.And sure enough, the new paper shows that the rate of new mutations rises steadily in men's germ cells – doubling every 16 1/2 years. Men in their 20s harbor about 25 random mutations, while a 40-year-old man has 65 mutations on average.
Embedded Link
Kids Of Older Fathers Likelier To Have Genetic Ailments : NPR
Icelandic scientists have found solid evidence that older men have more random mutations in their sperm cells. They’re warning that can cause autism, schizophrenia and a long list of other genetic dis…
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