Sentences with phrase «in phylogeny»

A closest neighbour analysis in the phylogeny showed that Indian populations have an affinity towards Southern European populations and that the time of divergence from these populations substantially predated the Indo - European migration into India, probably reflecting ancient shared ancestry rather than the Indo - European migration, which had little effect on Indian male lineages.

The ACC and FI, though sometimes considered ancient in phylogeny, feature a large bipolar projection neuron, the von Economo neuron (VEN), which is found only in humans, apes, and selected whales - all large - brained mammals with complex social structures.

In this phylogeny, the two ancient horses cluster together outside of the diversity of all living horses.

«Very few studies have investigated Alzheimer's disease pathology in chimpanzees, the species closest in phylogeny and most genetically related to humans,» said senior author Dr. Mary Ann Raghanti, associate professor and interim chair of anthropology at Kent State.

«Very few studies have investigated Alzheimer's disease pathology in chimpanzees, the species closest in phylogeny and most genetically related to humans,» said senior author Mary Ann Raghanti, Ph.D., associate professor and interim chair of anthropology at Kent State.

To look at the most elementary representation of that process, and since learning and memory are extremely conserved in phylogeny, you need to know what's good and what's bad, what's dangerous and what's safe, what's edible and what's toxic, so you need to learn how to discriminate between alternatives and to remember that decision; and that is such a conserved process that almost all animals with nervous systems can learn and remember.

Not exact matches

«This scenario reconciles the discrepancy in the nuclear DNA and mitochondrial DNA phylogenies of archaic hominins and the inconsistency of the modern human - Neanderthal population split time estimated from nuclear DNA and mitochondrial DNA,» says researcher Johannes Krause, also of the Max Planck Institute for the Science of Human History.

The integration of certain atoms and complicated molecules into neurons in the course of phylogeny, and further on into nervous systems and brains, could produce psychic processes.

Therefore, the individual becoming of man and the evolutionary becoming of mankind are mutually illuminating — an insight embodied in the old dictum that «ontogeny recapitulates phylogeny.»

Regarding phlyogeny v. phylogenetics, if what you meant to say was that phylogeny based on morphology has been shown to be false or is confounded by unreasonably high error rates in light of phylogenetic techniques, you're patently incorrect as the prior trees based on morphology have consistently, albeit not perfectly, matched the trees produced by genetic comparisons.

For 130 years palaeontologists have considered the phylogeny of the dinosaurs in a certain way.

Figuerola is one of the members of the Distantcom project, which is the continuation of the Ecoquim and Actiquim projects, led by Professor Conxita Àvila (Faculty of Biology - IRBio) to study chemical ecology, phylogeny, phylogeography and trophic ecology of marine invertebrate communities in the Antarctica.

New data from the Middle Jurassic of China shed light on the phylogeny and origin of the proboscis in the Mesopsychidae (Insecta: Mecoptera).

«A phylogeny and taxonomy is fundamental for all fields of biology that use lizards and snakes, to understand how to classify the species being studied, to interpret biological patterns in terms of relatedness, and even at a more basic level, to count how many species are in an area, for example, for conservation management purposes.»

«Another approach is to date phylogenies by looking at a «clock» of molecular changes that accumulate in the genetic code.

Past studies looked at the phylogeny (evolution and diversification) of the species in southern parts of Asia based on DNA polymorphisms.

The TENT contradicted some relationships in avian phylogenies generated from morphological characters (15), DNA - DNA hybridization (24), and mitochondrial genomes (14, 18)(Figs. 2, fig.

Introns outperform exons in analyses of basal avian phylogeny using clathrin heavy chain genes

These results suggest that in the context of protein - coding data only, high — base compositional heterogeneity and life history have a strong impact on incongruence with the species tree, and thus are not suitable for generating a highly resolved phylogeny.

Resolving conflict in eutherian mammal phylogeny using phylogenomics and the multispecies coalescent model

«For the first time, they have a well - supported phylogeny for all main branches,» says orchidologist Barbara Gravendeel of the Naturalis Biodiversity Center in Leiden, the Netherlands, who was not involved in the work.

Scientists at Chicago's Field Museum and international collaborators have reconstructed the phylogeny and biological history for the Yellow - shouldered bats in the New World tropics, the region of Earth surrounding the equator.

The paper's careful study of fish phylogeny supports an existing notion that Nogo - A may be a recent evolutionary development that correlates with more complex nervous systems and more complex functions, says Stephen Strittmatter, a neurologist at Yale University in New Haven, Connecticut.

Reconciling conflicting phylogenies in the origin of sweet potato and dispersal to Polynesia.

He adds that, in palaeontology, «phylogenies change from week to week».

Fred Grine, a palaeontologist at the State University of New York in Stony Brook, says, «basically what they're looking at comes down to nothing more than biogeography» and that «if you started finding catarrhines in South America, they'd also change the phylogeny».

Skin Microbiomes of California Terrestrial Salamanders Are Influenced by Habitat More Than Host Phylogeny — Alicia K. Bird — Frontiers in Microbiology

Maximum - likelihood estimation of population divergence times and population phylogeny in models without mutation Nielsen, R., J. L. Mountain, J. P. Huelsenbeck, and M. Slatkin.

He is interested in whether there may be a unifying principle for the operation of biological networks, one that cuts across phylogeny and type of network, that could revolutionize the natural sciences.

Working under the guidance of molecular anthropologist Ripan Malhi, she hopes to answer questions about phylogeny, biogeography, and island dwarfism among long - tailed macaques (Macaca fascicularis) in Southeast Asia by sequencing decades - and even century - old mitochondrial DNA collected from the dried skulls of monkeys in museum collections.

One view of the Phylogeny of Life on Earth (at the University of California at Berkeley's Museum of Paleontology) highlights the role of archeabacteria among prokaryotes — as a separate «Archaea domain» apart from Eubacteria — in the development of cellular life with nuclei (eukaryotes).

Using Niko Tinbergen's «four questions» as a guide, we will discuss the evolution of primates and emergence of the social function of the behavior (phylogeny), the development of the behavior during a individual's lifetime (ontogeny), the specific biological and chemical processes and motivations responsible for the behavior (mechanism), and how the behavior increase the fitness of individuals, allowing for its continual selection in primates (adaptive value).

The application of DEC and MAC parsimony with our molecular phylogeny suggests that Asia played a prominent role in the early evolutionary history of crown primates.

Phylogeny of Wisconsin spring - flowering plant species used in the analyses.

By contrast, we analyzed our molecular phylogeny with two methods that were developed explicitly for ancestral area reconstruction, and find support for the hypothesis that the most recent common ancestor of living Primates resided in Asia.

Due to this problem, competing ideas abound regarding the validity of rudolfensis and its proper place in hominid phylogeny.

This work involves molecular - genetic studies in the model flowering plant Arabidopsis thaliana and molecular, biophysical and bioinformatic studies in taxa chosen for their key positions in seed plant phylogeny.

Phylogeny of Massachusetts spring - flowering plant species used in the analyses.

All genes with a lipocalin domain (IPR000566) were extracted from Ensembl version 68 and a phylogeny was reconstructed in MEGA using the neighbour - joining method with the Kimura - 2 parameter model of substitution [55].

Because the polyT repeat is reported as the key variant to define TOMM40 clades A and B, 12 we used this marker and APOE isoform information to perform analyses based on phylogenetic groups as described by Roses et al. 12 Haplotype phase was estimated using PHASE software.22 The phylogeny, which represents the evolutionary relatedness of the haploytpes, was estimated using neighbor - joining with 10 000 bootstrapping replicates in the CLC DNA workbench (CLC bio, Aarhus, Denmark)(Supplemental Figure 3; http://neuroscienceresearch.wustl.edu/Pages/cruchaga2011.aspx).

«In our novel approach, we create the phylogeny based on all the genes in a genome, and then use the phylogeny to identify which genes provide positive support for the divergence of species.&raquIn our novel approach, we create the phylogeny based on all the genes in a genome, and then use the phylogeny to identify which genes provide positive support for the divergence of species.&raquin a genome, and then use the phylogeny to identify which genes provide positive support for the divergence of species.»

Lartillot, N., Brinkmann, H. & Philippe, H. Suppression of long - branch attraction artefacts in the animal phylogeny using a site - heterogeneous model.

In such cases we need to model population phylogenies with admixture and gene flow, and further development on rarecoal will enable us to study these more complex scenarios.

Genomics in the search for novel signature DNA sequences: We are using our combined expertise on evolutionary phylogeny, prokaryote cell physiology and comparative genomics to identify new signature sequences.

Multiple gains and losses of these five MGEs were identified in the CC22 phylogeny using ancestral state reconstruction.

In addition to standard clinical and molecular methods for influenza typing, next generation sequencing and subsequent de novo genome assembly were performed to investigate the phylogeny of the collected patient samples.

Mapping the changes in copy number to the phylogeny of these Y chromosomes previously established by the Project identified at least 20 mutational events, and investigation of flanking paralogous sequence variants showed that the mutations involved flanking sequences in 18 of these, and could extend over > 30 kb of DNA.

In particular, NGS has yielded direct estimates of mutation rates, and an unbiased and calibrated molecular phylogeny that has unprecedented detail.

Results: S. sonnei isolates clustered in five Latin American sublineages in the global phylogeny, with many (46 %, 149 of 323) belonging to previously undescribed sublineages.

By using a multidisciplinary approach involving neurobiology, phylogeny and ecology, I aim to better understand fish visual adaptations in relation to their environment and evolutionary history.