Sentences with phrase «ancestral state»
The phrase "ancestral state" refers to the original or primitive condition of something. It is the version or form of that thing that existed in the past or from which it evolved. Full definition
Using this system, we demonstrate an application of ancestral state reconstruction to assess geographic range dynamics in a lineage lacking a fossil record.
amnat.org
This symposium intends to gather researchers interested in various aspects of floral evolution: from deciphering the genes and gene networks involved in specific trait evolution to reconstructing ancestral states of floral traits.
Alu - insertion polymorphisms are a boon for the study of human population genetics and primate comparative genomics because they are neutral genetic markers of identical descent with known ancestral states.
Instead of performing alignments directly between human or mouse and each individual outgroup species, it uses alignments between groups of more closely related species to build a phylogeny of ancestral states [73, 75].
In the sentence that immediately follows this quotation, which is about the human mind, Dobzhansky says that evolution is a source of novelty, of forms becoming what did not occur at all in the ancestral state.
Not only did the beak structure revert, but the process also caused the palatine bone on the roof of the mouth to go back to its ancestral state.
It turns out these abnormal soldier ants were throwbacks to an ancestral state, one that no longer shows up within their species except, apparently, by accident.
«Evolutionary reversals to ancestral states are very rare in the animal kingdom,» noted coauthor Vrijenhoek.
Michael Donoghue and Erika Edwards, plant evolution researchers at Yale University in New Haven, Connecticut, analyzed water conservation mechanisms in the cactus genus Pereskia, an assortment of leafy shrubs and trees that are thought to represent the ancestral state of living cacti.
So which is the ancestral state, why did the earlier onset of maturity (the tricellular state) evolve so often, and is the tricellular state an evolutionary «dead end»?
Much to their surprise, the results from their analyses did not strongly support a bicellular ancestry, contrary to Brewbaker's findings, and, in fact, were ambiguous as to the ancestral state.
In this study, the researchers showed that in Cryptococcus amylolentus, the ancestral state, the P / R locus resided on chromosome 10 and the HD locus on chromosome 11.
The ancestral state reconstruction revealed patterns of convergent evolution, with high AR fins originating independently at least 22 times.
The researchers then mapped the fin shape of each species on the phylogeny, allowing them to track fin evolution from their ancestral state to living species.
The paper says that the termite gut microbiome is among the most complex of any animal group and has evolved enabling termites «to diversity their food source from the ancestral state of wood... and to achieve ecological dominance across tropical and subtropical regions of the globe.»
The multiplexed shotgun genotyping resolved species relationships and confirmed both the ancestral state of hymenoptera pollination and independent transitions to hummingbird pollination.
Female menopause (decreased fertility with continued survival) follows as a consequence of being the (assumed) ancestral state or as a trade - off favoring longevity over reproduction in women.
While these estimates were consistent with expectations based on the assumption that non-aligning non-recent transposon regions were ancestral, their ancestral state remained unverified.
In annelids, these cells differentiate into an axochord; our investigation of chaetognath musculature and an ancestral state reconstruction based on comparative anatomy (fig.
An ancestral state reconstruction based on our data and on a survey of bilaterian musculature (table S3) favored the presence of an axochord in protostome ancestors (fig.
Ancestral state reconstruction suggests that contractile mesodermal midline cells existed in bilaterian ancestors.
Dr. Beaulieu is developing a new set of ancestral state reconstruction methods that make more realistic assumptions about how characters evolve across very large phylogenies.
In the clade of red - light bioluminescent fishes (coined EPL clade), there are three species who have reverted back to the ancestral state of only using blue - light bioluminescence by the substitution at sites 253 and 292.
In the clade of red - light bioluminescent fishes (coined EPL clade), there are three species who have reverted back to the ancestral state of only using blue - light bioluminescence by the substitutions at sites 253 and 292.