(n.) One from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a fore father.
(n.) An earlier type; a progenitor; as, this fossil animal is regarded as the ancestor of the horse.
(n.) One from whom an estate has descended; -- the correlative of heir.
Example Sentences:
(1) The high frequency of increased PCV number in San, S.A. Negroes and American Negroes is in keeping with the view that the Khoisan peoples (here represented by the San), the Southern African Negroes and the African ancestors of American Blacks sprang from a common proto-negriform stock.
(2) The 500-bp element arose by duplication of one half of a 180-bp ancestor and insertion of a foreign segment between the two duplicated parts followed by amplification.
(3) The five offspring are ancestors of all known carriers.
(4) They are related as fourth cousins once-removed and fifth cousins in multiple ways through the six nearest common ancestors of all four parents.
(5) An analysis of 54 protein sequences from humans and rodents (mice or rats), with the chicken as an outgroup, indicates that, from the common ancestor of primates and rodents, 35 of the proteins have evolved faster in the lineage to mouse or rat (rodent lineage) whereas only 12 proteins have evolved faster in the lineage to humans (human lineage).
(6) Writing in the journal Nature , the researchers describe how our ancestors lost another piece of DNA that gives rise to both facial whiskers and sensitive spines on the tip of the penis, both of which are found in chimpanzees and other non-human primates.
(7) With the use of the chimpanzee and human sequences to calibrate the rate of mtDNA evolution, the age of the common human mtDNA ancestor is placed between 166,000 and 249,000 years.
(8) The functional and phyletic significance of this material reveals a complex pattern of behavioral and phyletic diversity among large-bodied catarrhines in Europe and suggests that this diversity evolved in situ from circum-Mediterranean middle Miocene ancestors.
(9) Regressions of descendant net revenue on ancestor net revenue were predominantly negative but generally were not significant.
(10) This finding also suggests that the Hex, Mut, and PMS systems evolved from a common ancestor and that functionally similar mismatch repair systems could be widespread among procaryotic as well as eucaryotic organisms.
(11) -In several cases, second or third generation descendents of 3T3 cells were observed to repeat track patterns of their ancestor cell.
(12) Within the family, EIAV, HTLV-III, and visna appear to be equally divergent from a common evolutionary ancestor.
(13) We deduce that in ubiquitin genes, concerted evolution involves both unequal crossover and gene conversion, and that the average time since two repeated units within the polyubiquitin locus most recently shared a common ancestor is approximately 38 million years (Myr) in mammals, but perhaps only 11 Myr in Drosophila.
(14) During this evolution the interior of the core blocks evolved as a homogeneous repetitive structure, while ancestor repeat units remained as sequence relicts in the terminal parts.
(15) The divergence of a common ancestor protein into PF4 and gamma IP-10 may have accompanied the development of sophisticated immune and coagulation systems in vertebrates.
(16) Analysis of different Mus subspecies indicates that TLev1 integrated into a common ancestor of the species Mus musculus.
(17) In order to assess the possibility that such proteins may have arisen through processes of divergent evolution from a common ancestor, a graphical presentation is given which correlates the pattern of allowed single base substitutions defined by the genetic code with the associated changes in the structural properties of the encoded amino acids.
(18) In an attempt to reconstruct the universal ancestor of all present-day tubulin genes the intron positions in 38 different alpha- and beta-tubulin genes from plants, animals, fungi and protozoa were compared.
(19) This raises the possibility of two lines of descent from a common ancestor.
(20) Phylogenetic analysis indicates that these four main virus groups might have diverged from a common ancestor at about the same time, long before the spread of AIDS in humans.
Cognate
Definition:
(a.) Allied by blood; kindred by birth; specifically (Law), related on the mother's side.
(a.) Of the same or a similar nature; of the same family; proceeding from the same stock or root; allied; kindred; as, a cognate language.
(n.) One who is related to another on the female side.
(n.) One of a number of things allied in origin or nature; as, certain letters are cognates.
Example Sentences:
(1) The use of sigma 54 promoters, known to require cognate binding proteins, could allow the fine-tuning that provides the temporal ordering of flagellar gene transcription.
(2) To date, a cognate action of E2 on the GnRH pulse generator has not been described.
(3) Cognate sites in genomes that diverged approximately 100 million years ago can be detected by PCR assays based on primer pairs from unique sequences.
(4) Cognate heat shock proteins might be involved in this renaturation process.
(5) LEW rats immunized with each of the three DA MHC chains produced alloantibodies to these chains, suggesting that indirect allorecognition did occur, because of the requirement for cognate recognition of B cells by T helper cells.
(6) Microcultures of helper T (Th) cells and a few appropriately primed murine B cells can be used to detect cognate T-B interactions which lead to clonal production of IgM, IgG1, and IgE.
(7) We have investigated the structural relationship of heat-inducible and cognate members of the human hsp70 gene family.
(8) If protein mixtures are subjected to affinity elution the cognate pair [tRNAPhe-phenylalanyl-tRNA synthetase] is eluted first, followed by noncognate pairs.
(9) These results suggest that cognate T-B cell interactions may be important in the development of IgE immune responses in the normal host.
(10) Ribosomes programmed by different synonymous codons also differ in discriminating among near-cognate aminoacylated tRNAs.
(11) These results were then compared with CVB-specific IgM levels in the cognate patient sera.
(12) This line induces proliferation of and Ig secretion by I-Ak expressing but not H-2d resting and activated B cells as a result of cognate interactions.
(13) The protein has been designated as a stress cognate protein based on previous studies and data presented herein that this protein cross-reacted with a monoclonal antibody originally raised against the Drosophila 70 kilodalton heat shock protein.
(14) By radioactive in situ hybridization (ISH) using a fragment from the murine Pax-1 paired box that is almost identical to the respective sequences from the cognate human gene HuP48 and fluorescence in situ hybridization (FISH) using a complete mouse Pax-1 cDNA, we have assigned the human homologue of murine Pax-1, the PAX1 locus, to chromosome 20p.
(15) One region in most sigma factors makes sequence-specific contacts at the -10 region of its cognate promoters.
(16) This suggests that the SRE and its cognate protein are likely to be involved in the regulation of Krox-24 and presumably of other immediate-early serum response genes.
(17) A third Slp gene exists within this locus whose recombinant cognate did not express in L cells.
(18) Two of the hox appear to be cognates of the human Hu-1 (or mouse Hox 2.1) and the mouse Hox 1-3, while another is closely related to the mouse Hox 1-4.
(19) Comparison of our skeletal muscle translocator sequence with that of a recently published human fibroblast translocator cognate revealed that the two proteins are 88% identical and diverged about 275 million years ago.
(20) Comparison of the nucleotide and deduced amino acid sequence of this genome segment with cognate segments of isolates of BTV 1 from Australia and South Africa, and BTV 10 and BTV 17 from the United States, revealed homologies of 98%, 80%, 79%, and 79%, respectively, at the nucleotide level and 98%, 90%, 89%, and 90% identity, respectively, at the amino acid level.