Can selfless genes beat selfish genes?
Articles about PSYCHOLOGY: http://www.scoop.it/t/science-news?tag=psychology
Via Sandeep Gautam
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Μια παλιά ιδέα της βιολογίας έλεγε ότι το ποιός είσαι είναι θέμα των γονιδίων που έχεις. Είναι πλέον σαφές ότι ένα εξίσου σημαντικό θέμα είναι και ποιά γονίδια χρησιμοποιείτε. Όπως και όλη η βιολογία, το θέμα αυτό έχει μια χημεία στον πυρήνα του. Τα κύτταρα του πρώιμου εμβρύου μπορεί να εξελιχθούν σε οποιοδήποτε τύπο ιστού. Αλλά καθώς το έμβρυο μεγαλώνει, τα λεγόμενα πολυδύναμα βλαστικά κύτταρα διαφοροποιούνται, αποκτώντας συγκεκριμένους ρόλους (όπως αίμα, μυς ή νευρικά κύτταρα), που παραμένουν σταθερά στους απογόνους τους. Via secret876 
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(PhysOrg.com) -- Researchers from The Australian National University have discovered that the male-specific Y-chromosome is shrinking – and it’s happening at different rates across species.
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A perfume that one person loves may be repulsive to another. The difference is in our genes, a new study suggests.
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From
io9
We all know that DNA evidence can make or break a forensic investigation, but it's not uncommon for police to encounter DNA at a crime scene that doesn't match with entries in any DNA databases.
Brett Coffman's curator insight,
March 27, 2014 10:07 AM
"A3" Eye color can be told by Dna. A team of Dutch scientists has now developed a genetic screen, called IrisPlex, that can help police determine with 94% accuracy whether a suspect has blue eyes or brown, just from a sample of their DNA. Is this the dawn of a new era in forensic investigation? IrisPlex works by searching for single-letter differences in your genetic code called single nucleotide polymorphisms, or SNPs, that are strongly linked to eye color; the genetic screening kit searches for six of these SNPs in total, labeling them as blue, brown, or undefined (undefined corresponding to an intermediate color like green or grey) as it evaluates the DNA under scrutiny.
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Experience may contribute to mental illness in a surprising way: by causing...
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A Planet of Viruses | There are 100 trillion microbes that live in your body. Do you own them? Do they deserve the same protections as your own genes and cells?
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“You are what you eat.” The old adage has for decades weighed on the minds of consumers who fret over responsible food choices. Yet what if it was literally true? What if material from our food actually made its way into the innermost control centers of our cells, taking charge of fundamental gene expression?
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A mutation that appeared more than half a million years ago may have helped humans learn the complex muscle movements that are critical to speech and language.
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Virtually all organisms with complex cells—better known as eukaryotes—have at least two separate genomes. The main one sits in the central nucleus. There’s also a smaller one in tiny bean-shaped structures called mitochondria, little batteries that provide the cell with energy. Both sets of genes must work together. Neither functions properly without the other.
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NASA-funded researchers found evidence this past summer that some building blocks of DNA, the molecule that carries the genetic instructions for life, found in meteorites were likely created in space.
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Young genes that appeared since the primate branch split from other mammal species are expressed in unique structures of the developing human brain, a new analysis finds.
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Ever wondered why you wake up in the morning -- even when the alarm clock isn't making jarring noises? Wonder no more.
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According to a paper just published (but available online since 2010), we haven't found any genes for personality. Articles about NEUROSCIENCE: http://www.scoop.it/t/science-news?page=1&tag=neuroscience
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Spending long periods at low gravity may alter genes, suggests a new experiment involving a magnet-powered trick used on Earth to simulate weightlessness in space.
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As an embryo develops, different genes are turned on in different cells, to form muscles, neurons and other bodily parts. Inside each cell's nucleus, genetic sequences known as enhancers act like remote controls, switching genes on and off.
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Here's a paper - soon to appear in Psychological Science - which says that Most Reported Genetic Associations with General Intelligence Are Probably False Positives
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Ed Boyden shows how, by inserting genes for light-sensitive proteins into brain cells, he can selectively activate or de-activate specific neurons with fiber-optic implants. With this unprecedented level of control, he's managed to cure mice of analogs of PTSD and certain forms of blindness. On the horizon: neural prosthetics. Session host Juan Enriquez leads a brief post-talk Q&A.
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![My Mother, Myself [ANIMATION] | Science News | Scoop.it](https://img.scoop.it/RqLtVtw41_IjJKPSKCWgPDl72eJkfbmt4t8yenImKBVvK0kTmF0xjctABnaLJIm9)
See how a rat’s mothering style can be passed down to her pups—and to their pups and so on--by altering the mix of chemical groups, or epigenetic marks, on genes in the brain.
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A mutation may have helped humans learn how to create complex speech and language.
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A mutation that appeared more than half a million years ago may have helped humans learn the complex muscle movements that are critical to speech and language.
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Earlier this week, WBUR's Here and Now ran a a taped interview with me about Beautiful Brains, my recent National Geographic article on teen brain and...
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The gene appears to be more common in depressed people who have attempted suicide than in those who have not...
Noah Schmidt's curator insight,
May 23, 2013 9:56 AM
Biology does seem to be a factor in the issue of suicide. From research, most people who attempted suicide were also found to have the gene called RGS2. 43% of the people who attempted suicide had this gene.
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For years, scientists believed the vast phenotypic differences between humans and chimpanzees would be easily explained – the two species must have significantly different genetic makeups. However, when their genomes were later sequenced, researchers were surprised to learn that the DNA sequences of human and chimpanzee genes are nearly identical. What then is responsible for the many morphological and behavioral differences between the two species? Researchers at the Georgia Institute of Technology have now determined that the insertion and deletion of large pieces of DNA near genes are highly variable between humans and chimpanzees and may account for major differences between the two species.
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Now I get it. We can’t help ourselves. When it comes to spending and saving, we are genetically wired to be what we are, and there isn’t a lot anyone can do about it, according to a study by Stephan Siegel at the University of Washington and Henrik...
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