News articles tagged with 'mutation' (Page 74)
Human embryonic stem cells derived from preimplantation genetically diagnosed embryos
— 14 Nov 2007 19:16 | BiologyA human stem cell line derived from embryos that were identified by preimplantation genetic diagnosis (PGD) to carry the mutation for fragile X syndrome has provided an unprecedented…
Ancient retroviruses spurred evolution of gene regulatory networks in humans
— 14 Nov 2007 18:07 | BiologyWhen ancient retroviruses slipped bits of their DNA into the primate genome millions of years ago, they successfully preserved their own genetic legacy. Today an estimated 8 percent…
At least one percent of Neanderthals were redheads
— 25 Oct 2007 21:51 | Geology and palaeontologyAncient DNA retrieved from the bones of two Neanderthals suggests that at least some of them had red hair and pale skin, scientists report this week in the journal Science. The international…
Scientists devise way to calculate rates of evolution
— 3 Oct 2007 09:05 | BiologyU.S. scientists are the first to link the evolution of proteins - the organic compounds that determine the structure and function of living things - to a species' metabolic rate. Their…
Scientists retrace evolution with first atomic structure of an ancient protein
— 17 Aug 2007 07:44 | ChemistryScientists have determined for the first time the atomic structure of an ancient protein, revealing in unprecedented detail how genes evolved their functions. Never before have we seen…
Natural selection at work in dramatic comeback of male butterflies
— 12 Jul 2007 21:43 | BiologyAn international team of researchers has documented a remarkable example of natural selection in a tropical butterfly species that fought back - genetically speaking - against a highly…
A new view of photosynthesis
— 3 May 2007 20:00 | BiologyDuring the remarkable cascade of events of photosynthesis, plants approach the pinnacle of stinginess by scavenging nearly every photon of available light energy to produce food. Yet…
Why some aphids can not stand the heat?
— 20 Apr 2007 00:10 | BiologyFor pea aphids, the ability to go forth and multiply can depend on a single gene, according to new research. An overheated aphid with a mutation in that gene can not reproduce. The…