(a.) Having many distinct sources; originating at various places or times.
(a.) Of or pertaining to polygenesis; polyphyletic.
Example Sentences:
(1) I have stressed the influence of genetic factors, best exemplified as a single gene aberration in the occurrence of Heberden's nodes, while a polygenetic interplay may be involved in other forms of hand GOA.
(2) Genetic studies suggest a polygenetic mode of inheritance and a lower threshold of manifestation in women.
(3) There was little evidence for the polygenetic multiple threshold model of sex inheritance.
(4) The great variety of pathogenic factors emphasizes that metabolic myelosis must be counted among the polygenetic identical reactions of the central nervous system.
(5) The estimate of the fraction of interindividual variability associated with polygenetic effects was 26.5%.
(6) The finding that the Yaa gene-induced acceleration of lupus-like autoimmune disease is modulated by gene(s) within or closely linked to the H-2 complex underlines the crucial role of the major histocompatibility complex and the polygenetic nature of autoimmune disease in BXSB mice.
(7) In line with F1 data, it demonstrates the presence of a polygenetic correlate: at least one other locus is involved in each of the six outcome parameters.
(8) The hypothetical model for each psychosis proposes that polygenetic inheritance affects different central nervous system neuroanatomical sites in the human which are in homeostasis as to catecholamine neurotransmitter regulation of the psyche.
(9) This approach enables one to simultaneously estimate the frequencies and effects of alleles at specific loci along with the residual polygenetic variance component.
(10) It must be seen as a "phenomenologically identical, polygenetic type of reaction" (Janzen).
(11) By measuring polymorphic protein variability and restriction site variability in small regions of DNA known to contain genes that code for the proteins involved in these functions, it is possible to assign polygenetic effects to specific alleles or haplotypes.
(12) An autosomal-dominant mode of inheritance with reduced penetrance or a polygenetic mode of inheritance are discussed.
(13) Although the unique MHC haplotype of NOD mice is clearly a major contributor to diabetes susceptibility, evidence for a complex interaction between MHC loci and many other polygenetic factors is reviewed.
(14) The series of events that occurs after infection or tissue damage is polygenetic and involve multiple pathways.
(15) Polygenetic predisposition is a key factor in the multifactorial disorders of primary hypertension.
(16) Tetraspastic is a "polygenetic" reaction of the central nervous system without a final common path.
(17) According to their data and findings in literature, the following hypothesis was made: porphyria cutanea tarda is assumed to be a disease following the rules of the polygenetical heredity.
(18) In animal experiments, the authors have shown that the SLMC reaction directed againt a virus-induced tumour is under polygenetic control primarily governed by gene(s0 linked to the histocompatibility region.
(19) The majority of inherited diseases are due to unknown biochemical defects, or are either polygenetic or multifactorial.
(20) Thus, variation in this gene region may be one of the polygenetic factors involved in determining cholesterol levels in the normal population.
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.