(a.) Of, pertaining to, derived from, or possessed by, an ancestor or ancestors; as, an ancestral estate.
Example Sentences:
(1) We conclude that chloramphenicol resistance encoded by Tn1696 is due to a permeability barrier and hypothesize that the gene from P. aeruginosa may share a common ancestral origin with these genes from other gram-negative organisms.
(2) The Mexican-Americans of Starr County, Texas, classified by sex and birthplace, were studied to determine the extent of genetic variation and contributions from ancestral populations such as Spanish, Amerindian and West African.
(3) From the decreased alignment at the N-terminus and the presence of additional residues compared with bacterial phosphorylases, we conclude that the regulatory sequences that also carry the phosphorylation site in the muscle enzyme were joined to a presumed ancestral precursor gene by gene fusion after separation of the eukaryotic and prokaryotic lines of descent.
(4) The HindIII restriction patterns of 3 of the ancestral S. enteritidis plasmids were identical to the modern 38 MDa plasmid, while all contained identical bands of 3.5, 2.7 and 1.9 kb.
(5) Before 1948, the Bedouin tribes lived and grazed their animals on much of the Negev, claiming ancestral rights to the land.
(6) The US had said a Kenyatta win would have "consequences" and, when president Barack Obama undertook on a tour of Africa in June and July, he did not visit his ancestral home.
(7) These results support a hypothesis which proposes that ancestral SIN virus diverged into two distinct groups.
(8) It is suggested that the multicopper oxidases have evolved from an ancestral copper protein which presumably contained all the ligands required for the binding of one binuclear and two additional mononuclear metal centers.
(9) The male is intermediate between the female and the ancestral condition observed in other turtle species.
(10) This result implies that these molecules arose by way of a series of partial gene duplications of a primitive gene that coded for a smaller ancestral protein.
(11) This implies that all of these neurotransmitter transporters may have evolved from a common ancestral gene that diverged into the GABA, glycine and catecholamine subfamilies at nearly the same time.
(12) PSI-G and PSI-K probably have evolved from a gene duplication of an ancestral gene.
(13) The results are interpreted to indicate that at least the C-terminal portions of the core histones evolved from a common ancestral protein.
(14) The approach is illustrated by several examples of previously unknown correspondences with important biological implications: Drosophila elongation factor Tu is shown to be encoded by two genes that are differently expressed during development; a cluster of three Drosophila genes likely encode maltases; a flesh-fly fat body protein resembles the hypothesized Drosophila alcohol dehydrogenase ancestral protein; an unknown protein encoded at the multifunctional E. coli hisT locus resembles aspartate beta-semialdehyde dehydrogenase; and the E. coli tyrR protein is related to nitrogen regulatory proteins.
(15) Although most studies emphasise the similarity of the australopithecines to modern man, and suggest, therefore, that these creatures were bipedal tool-makers at least one form of which (Australopithecus africanus--"Homo habilis", "Homo africanus") was almost directly ancestral to man, a series of multivariate statistical studies of various postcranial fragments suggests other conclusions.
(16) The conservation of genomic organization, together with the high sequence homology, indicates that the mouse H+,K(+)-ATPase beta and Na+,K(+)-ATPase beta 2 subunit genes originated from a common ancestral gene.
(17) The manor house in The Private Patient has been sold by its ancestral owners to cover their debts and bought by self-made plastic surgeon George Chandler-Powell.
(18) Characterization of the gene organization within disease-associated ancestral haplotypes will provide new insights into the functional role and evolution of the major histocompatibility complex.
(19) Similarities observed between these two genes with respect to both peptidic sequence and intron position strongly suggested that this locus originated from the duplication of an ancestral transcription unit.
(20) Our findings substantially increase the evidence indicative of a human-chimpanzee-gorilla clade with ancestral separations around 8 to 6 Myr ago.
Polyphyletic
Definition:
(a.) Pertaining to, or characterized by, descent from more than one root form, or from many different root forms; polygenetic; -- opposed to monophyletic.
Example Sentences:
(1) Both perforating-type infarcts and cortical-type infarcts were found, suggesting that infarct-related foci of depressive states were polyphyletic.
(2) This clearly indicated a close phylogenetic relationship between the plastids of Rhodophyta and Chromophyta which seem to have evolved independently from the chloroplasts (polyphyletic origin).
(3) Gene genealogy in two partially isolated populations which diverged at a given time t in the past and have since been exchanging individuals at a constant rate m is studied based upon an analytic method for large t and a simulation method for any t. Particular attention is paid to the conditions under which neutral genes sampled from populations are mono-, para-, and polyphyletic in terms of coalescence (divergence) times of genes.
(4) These findings are in agreement with the hypothesis of a polyphyletic origin of plastids.
(5) Wild sheep with 2n=54 may have evolved monophyletically from an ancestral 2n=58-56-54 population or polyphyletically by a series of independent, nonrandom fusions.
(6) When only plastidic features are considered, it is difficult to distinguish between monophyletic and polyphyletic xenogenous origins of plastids.
(7) The association is monophyletic in cockroaches but polyphyletic in many groups, including the sucking lice, beetles and scale insects.
(8) Although chloroplasts probably originated only once, eukaryotic algae are polyphyletic because chloroplasts have been secondarily transferred to new lineages by the permanent incorporation of a photosynthetic eukaryotic algal cell into a phagotrophic protozoan host.
(9) Among the Iguania, the Iguanidea are polyphyletics, the north-american forms breaking up from the other very early.
(10) This great diversity in the chromosomal genome raises the possibility that R. leguminosarum biovar phaseoli is a polyphyletic assemblage of strains.
(11) The developed systemic approach using the analysis of the MGIT system and integral differences between viruses by the totality of their properties helped to form models of virus evolution taking into account, in particular, their mono- or polyphyletic origin, more definite knowledge on pravirus(es) MGIT, etc.
(12) The data support the idea of a polyphyletic origin of the phycomycetes and suggest that anascosporogenous yeasts tested are related to the heterobasidiomycetes rather than to the Endomycetales.
(13) However, it was expected that in Switzerland, inbreeding from isonymy would be an overestimate due to patrilocal residence and polyphyletic names.
(14) Our results support hypotheses that most taxonomic concepts of the order Nymphaeales reflect polyphyletic groups and that the unusual genus Ceratophyllum represents descendants of some of the earliest angiosperms.
(15) We also show that the prochlorophytes are a highly diverged polyphyletic group.
(16) Taxonomic relations between methylotrophic and non-methylotrophic bacteria are discussed, and the polyphyletic nature of methylotrophy as a taxonomic feature is highlighted.
(17) Sequence comparisons support the idea of a polyphyletic origin of the red algal and the higher-plant chloroplasts.
(18) Naegleria gruberi is most likely a polyphyletic grouping and care should be taken when using one strain as a reference point for this species.
(19) These data provide strong evidence for a polyphyletic origin of chloroplasts and rhodoplasts.
(20) Evidently, then, heterogamety and sex-chromosome heteromorphism are polyphyletic, although certain sex-determining genes may be held in common among the diverse taxonomic groups.