Tag: "variation" at biology news
Color perception is not in the eye of the beholder: It's in the brain
...oking to identify the genetic basis for this large variation
between retinas. Early tests on the original volunteers showed no simple connection among certain genes and the number and diversity of color cones, but Williams is continuing to search for the responsible combination of genes....
Studies on human genome variation provide insight into disease
...nymous genetic 'twins.' "Research in human genetic variation
is rapidly moving towards realizing our aims of improving diagnosis of common diseases such as diabetes and heart disease," says Cardon, "but the genome is tricky; it won't reveal its secrets easily. The real disease-causing culprits can have many s...
Baylor Human Genome Sequence Center key player in mapping human genetic variation
...al next stepping stone to understanding human gene variation
and its relationship to disease in a commentary in...e partnership to determine the patterns of genetic variation
common in the world's populations. Gibbs and the Baylor sequencing center participated in genotyping...
International consortium completes map of human genetic variation
...ic-private effort to chart the patterns of genetic variation
that are common in the world's population. The results provide overwhelming evidence that variation
in the human genome is organized into local neighborhoods, called haplotypes, that usually are inher...
Haplotype map offers new insights into human disease, evolution
...nce substantial advances in relating human genetic variation
to disease and understanding human evolutionary hi...he authors describe the common patterns of genetic variation
in human DNA samples collected from four sites around the world. The Consortium's findings provide o...
Baby's genes affect mom's cholesterol levels
...re not always as predicted. For example, a genetic variation
that raises the levels of triglycerides and cholesterol when expressed in mothers may lower these levels when it is expressed simultaneously by the fetus in the placenta. These findings have implications for many women who are advised not to have chi...
California computer scientists double volume of data in NIH biotech repository
...ing of an individual's DNA yields a map of genetic variation
which can give clues to the genetic underpinning o...pulation. SNPs account for the most common type of variation
in DNA sequence in humans and due to the recently developed high-throughput genotyping technology, g...
Forsyth scientists identify a gene responsible for facial diversity
... jaw morphology in a way that approximates natural variation
among fish species. According to Dr. Albertson, "... jaw shape changes in a way that parallels natural variation
among cichlid species. "This work provides new insights into the mechanisms that underlie biodivers...
UT Southwestern physician-researcher wins international award for lipid research
...le, that at least one out of every 50 blacks has a variation
in one particular gene that results in a 40 percent-lower level of LDL. The award is named after German chemist Dr. Heinrich Otto Wieland (1877-1957), who won the Nobel Prize in 1927 for his work on bile acids. Dr. Hobbs' work provides new insights ...
Resetting epigenetic code could aid lupus patients
...lthy individuals and lupus patients. There also is variation
among lupus patients. These differences may explain why some lupus patients develop kidney disease and others do not, or other symptoms like arthritis or skin disorders. Prior to this research, the prevailing theory is that the variations were due t...
Central Americans save plant diversity through local cultivations
...ies in Central America actually have saved genetic variation
in the jocote (ho-CO-tay), (Spondias purpurea), a ...acidic), it can be said that there is considerable variation
in the species. The wild fruits are generally bright red, smaller, and more acidic than cultivated...
'Perception' gene tracked humanity's evolution, scientists say
...prodynorphin gene. Past research has also observed variation
in expression levels within humans. This report s...e prodynorphin after noticing an unusual amount of variation
in the human version's promoter. The scientists decided to examine the prodynorphin gene in human be...
Two genetic traits giving Africans malaria protection lose effectiveness when they occur together
...ms said researchers have long known that a genetic variation
known as alpha thalassemia--which is common in sub-Saharan Africa but, unlike beta thalassemia, is not associated with major health problems--also helps people fight malaria. While not offering as much protection as the sickle trait, Williams said c...
Scientists find more evidence of resistance to once effective malaria drugs
... in two villages in northern Tanzania of a genetic variation
in the malaria parasite that may be associated wit...been noted at several sites in Africa, the genetic variation
linked to resistance had not yet been observed on the continent. Researchers conclude that "its occ...
Number of serotonin receptors influences brain's response to fear and stress
... the brain basis of a relationship between genetic variation
and behavior. Studying people who carry a form of ...ional studies to determine the impact this genetic variation
has on individual differences in these serotonin receptors and the resulting activity of the subgenu...
Gene at heart of bad outcomes in high blood pressure patients
...plications. "In our study, carriers of the genetic variation
had an approximately 43 percent higher risk of death, heart attack or stroke," she said. "Thus, this helps us piece together the puzzle of the various genes that lead to some people having worse outcomes than others when they have hypertension." Gene...
New collaboration on rice DNA variation study
...d today that they will collaborate to identify DNA variation
in fifteen rice strains. By identifying sequence variation
between major rice varieties, the study will help uncover the genetic basis underlying important agr...
DNA barcodes put to the test
...ecies. To capture the full range of within-species variation
and geographic differences in population structure, they included sequences from multiple individuals and geographic extremes. Meyer and Paulay tested barcode performance in species identification and discovery against traditional morphology-based sp...
Climate models need deeper roots, scientists say
...ergy cycle, plants can influence the climate. "The variation
of soil moisture in the deeper layers is a long term variation
that we believe will be highly correlated with long term variations produced by climate models," Kum...
How do boxers differ from poodles? Researchers collar genomes
...). "This work demonstrates a significant amount of variation
that you can see between individual dogs at the ge...investigator of the project, funded by TIGR. "That variation
can now be exploited to study the differences between dogs, their diseases, development and behavior...
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