Sentences with phrase «genetic studies only»

Although previous studies have found that a large percentage of hair colour variation is explained by heritable factors, previous genetic studies only identified a dozen or so hair colour genes.

But this was a prediction based on genetic studies only.

Not exact matches

Cases of identical twins separated at birth who were outlined in this study indicated that only one third of our ability to think creatively is genetic.

However, this study only included kids at high - risk for celiac (based on genetic markers or a first - degree relative with the disease), so it might not apply to the general population.

Several studies have also attempted to understand the role of breastfeeding on IQ, and although some authors conclude that the observed advantage of breastfeeding on IQ is related only to genetic and socioenvironmental factors, a recent meta - analysis showed that after adjustment for appropriate key co-factors, breastfeeding was associated with significantly higher scores for cognitive development than formula feeding.6 Longer duration of breastfeeding has also been positively associated with intelligence in adulthood.22 We also observed the benefits of long - term breastfeeding on mental indices, along with the indirect benefit of balancing the impact of exposure to p, p ′ DDE after adjustment for some socioeconomic variables.

Stepfathers are widespread not only in modern industrial societies but also in subsistence - level societies as well.6, 51,52 Many studies have found that, compared with resident biological fathers, stepfathers invest less in the children who live with them, both in the United States37, 39,53 and other cultures.54 - 56 Stepchildren are more likely to have emotional and behavioural problems than resident genetic offspring, 39,40 although there is evidence that children who have close relationships with their stepfathers have better outcomes.41, 57

Study have been made, pregnancy is not the only way or symptom to get stretch marks, because genetic history do play role with stretch mark appearing.

Of the thousands of ancestral variants reintroduced into modern humans, only 41 have been linked in genetic studies to diseases, such as skin conditions and neurological and psychiatric disorders, he said.

One high - profile recent study suggested that each genetic component entered Europe by way of a separate migration and that they only came together in most Europeans in the past 5000 years.

Of all four groups studied, only those at high genetic risk for Alzheimer's who did not exercise experienced a decrease in hippocampal volume (3 %) over the 18 - month period.

The authors note that while the sample size of the meta - analyses was large (123,132 to 260,861 participants in different studies), they used only GWAS summary statistics and can not estimate all genetic variance factors; some studies also used different methodologies.

Widschwendter, who led the study, said: «Our work provides clear evidence that it is not only genetic alterations which trigger and lead to cancer but that epigenetic alteration can also be the initiating step.»

Burt has made a career studying «selfish genetic elements,» parasitic pieces of DNA or RNA that exist only to propagate themselves.

«We don't know why only a fraction of individuals with genetic risk factors for celiac disease actually become gluten intolerant,» said Peter Green, MD, the Phyllis and Ivan Seidenberg Professor of Medicine at Columbia University Medical Center (CUMC), Director of the Celiac Disease Center at Columbia University and co-author on the study.

Currently only a handful of known genetic mutations have been found to account for about 10 percent of glaucoma, says Liu, corresponding author of the study in the journal Human Molecular Genetics.

They reached out to clinicians worldwide to identify patients with arhinia — before this study only 80 cases had been reported during the past century — and gathered samples for genetic sequencing.

«Our study is the first to provide empirical evidence that artificial insemination with long - stored spermatozoa is not only possible but also beneficial to the genetic diversity of an endangered species,» said David Wildt, lead author, senior scientist and head of the Center for Species Survival at SCBI.

Mayer and McHugh also appear to be data snooping when they reference only one of six studies in the peer - reviewed literature of the past 16 years that employ proper probability - sampling methods, «and it just so happens to be the one with the lowest estimate of genetic influence of the entire set,» Hamer says.

In a meta - analysis of studies that linked genetic markers to cultural heritage in North and Central America, Iceland, Australia, Africa and New Guinea, they found that only Y - chromosome DNA reflected the cultural origins of the local language.

«In this sense, pending the collection of new samples of this new Mediterranean Osedax species to study its morphological characteristics, the only differences that we have been able to determine in relation to other species are genetic,» notes Sergi Taboada.

He omits, for example, the studies showing that children who are abused or neglected are only slightly more likely to become delinquent than children who are not: once again the difference may be caused by genetic inheritance rather than by the parents» maltreatment.

«It is amazing to me that more than 100 years after the discovery of genetic recombination in flies, we are only starting to understand just how these events are distributed,» says R. Scott Hawley, Ph.D., an investigator at the Stowers Institute and senior author of the study.

With the aim of studying the history and genetic diversity of the species, analysis was conducted on the genomes of another ten Iberian lynxes from Doñana and Sierra Morena, the only two surviving populations on the Iberian Peninsula, which have been isolated from each other for decades.

Their traditionally low - budget science, which needs only pencil and paper to tally shared traits in the classical twin studies, has entered the high - tech world of genetic epidemiology, which traces the power of genes to influence the health of populations.

«Studies focused only on additive effects often explain just a fraction of the genetic basis of many traits.

That's the only way to get ES cells with the genetic signatures of patients whose diseases they want to study.

Only one gene — TCF4 — has been successfully associated with Fuchs dystrophy in genetic studies.

Neanderthal genetic material is found in only small amounts in the genomes of modern humans because, after interbreeding, natural selection removed large numbers of weakly deleterious Neanderthal gene variants, according to a study by Ivan Juric and colleagues at the University of California, Davis, published November 8th, 2016 in PLOS Genetics.

Although specific microbial halogenation reactions have been recognized for decades and the link between the dehalogenation of anthropogenic halogenated contaminants in laboratory cultures and contaminated field sites has been well established, only a few studies specifically looked at pristine ecosystems and the genetic potential for microbial degradation of naturally occurring organohalogens, Kappler says.

Despite the size of this study, the new genetic findings likely explain only about 3 percent of autism's genetic roots, researchers behind the new study noted.

Morgan Fullerton, lead author of the study, added: «Unlike the majority of studies using genetic mouse models, we haven't deleted an entire protein; we have only made a very minor genetic mutation, equivalent to what might be seen in humans, thus highlighting the very precise way metformin lowers blood sugar in Type 2 Diabetes»

This bank of living tumour cells allowed the team to study not only the genetics of the cells, but also how genetic mutations in the mitochondria — which drive energy production in the cell — caused changes in the cell's metabolism.

Previous studies that used only information from genetic analyses of current species have suggested that birds arose anywhere from 72 million to 170 million years ago.

«Since our study only looked at common gene variants, the total genetic overlap between the disorders is likely higher,» explained Naomi Wray, Ph.D., University of Queensland, Brisbane, Australia, who co-led the multi-site study by the Cross Disorders Group of the Psychiatric Genomics Consortium (PGC), which is supported by the NIH's National Institute of Mental Health (NIMH).

Genetic studies of drug response are often based only on memory of the response rather than systematically recorded data.

This study opens up new avenues for the role of purified resveratrol in preventing cancer, but suggests that it may only be effective for people with a specific genetic make - up, particular diets and lifestyles.

In the second study, another of Worobey's graduate students, Marlea Gemmel, analyzed HIV - 1 genetic material obtained from lymph tissue collected in 1960 from the University of Kinshasa pathology department in the Democratic Republic of the Congo — only the second HIV sequence predating 1976 deciphered to date.

In their recent paper, the researchers not only looked at the genetic code, but also studied how gene activity varied between the two populations.

Anthropologists and geneticists know that populations throughout the world migrated from Africa more than 60,000 years ago (see diagram), and that the human genome is at its most diverse in our continent of origin, but previous studies have only scratched the surface of African genetic diversity.

The low amount of genetic diversity in the current population, which is descended from only 14 genetic founders from the captive flock, was already well known, but this was the first study to show that there was substantial genetic diversity in the historical population.

«In the space of just five years, reasonably affordable studies using DNA sequencing have advanced from using only a handful of genetic markers to more than 2,000 — an unbelievable amount of DNA,» adds Simison.

Only one question concerned NCRR: Genome institute scientist Shawn Burgess asked what will happen to the center's fruit fly and yeast stock resources for genetic studies.

«This shows that the risk of developing type 2 diabetes is not only genetic, but also epigenetic,» said Charlotte Ling, who led the study.

The study, published online Oct. 17 in Molecular Psychiatry, shows that only male mice with the autism - associated genetic deletion have abnormal reward - learning behavior.

She studies South American flies that can look exactly the same and can be distinguished only by genetic analysis.

A startling new study of fragile X syndrome — the most common cause of inherited mental retardation as well as a leading genetic cause of autism — indicates that not only can malformed nerves be repaired but that behavior can be restored to normal, or nearly so.

Valentina Coia explains further: «The first hypothesis could not be ruled out given that the study considered only 85 modern comparison samples from the K1 lineage — the genetic lineage that also includes that of Ötzi — which comprised few samples from Europe and especially none from the eastern Alps, which are home to populations that presumably have a genetic continuity with the Iceman.

«This important study not only adds more genetic risk factors to the list of those known for testicular germ cell tumours — the most common cancer in young men — but also adds detail to the emerging picture of testicular cancer as a strongly heritable disease.

The fusion of these two genes was observed in just three percent of tumors studied, so any therapy based on this particular genetic aberration would apply to only a small subset of glioblastoma patients.

Deep Sequencing of Influenza A Virus from a Human Challenge Study Reveals a Selective Bottleneck and Only Limited Intrahost Genetic Diversification.