(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.
Sib
Definition:
(n.) A blood relation.
(a.) Related by blood; akin.
Example Sentences:
(1) The sexual attitudes and beliefs of 20 children who have been present at the labor and delivery of sibs and have observed the birth process are compared with 20 children who have not been present at delivery.
(2) We document four patients, including two sibs, with asphyxiating thoracic dystrophy and mild congenital hydrocephalus.
(3) However the study does not permit to reach any valid conclusions; further elaborate investigations alone could prove the useful role of genetic influence in the propagation of lepromin sensitivity to the subsequent sibs.
(4) The residual values were positively correlated in parent-offspring pairs and among sibs, both those presumed to be living together and those presumed to be living apart.
(5) A case of fragile-X syndrome (the Martin-Bell syndrome) in two male half-sibs from different marriages of their mother was described.
(6) No evidence was found of sex ratio anomalies in other classes of relative of pyloric stenosis index cases, whether or not the index cases had affected sibs.
(7) The ibd for grandparent-grandchild pairs is least affected by recombination, followed by sibs, half-sib, uncle-nephew, and first-cousin pairs.
(8) Nonagouti rats were significantly easier to approach, capture, and handle than their agouti sibs.
(9) This sib risk was apparent for probands with only a single hemivertebrum in addition to probands with more extensive vertebral defects and would support an etiological relationship between neural tube defects and other vertebral malformations.
(10) None of the sibs had BRA when the index case had BRA as part of a multiple malformation complex.
(11) probands and the estimated, future prevalence was found to be the same in sibs and children.
(12) The concept of LPC can also be used to interpret two factors which have been proposed to select for the Hamiltonian sex ratios: local mate competition is LPC acting through sons; and sib mating is LPC acting through daughters.
(13) We describe the concurrence of severe distal osteolysis, mental retardation, short stature, and characteristic facial appearance with maxillary hypoplasia and relative exophthalmos in two adult sibs, a 57-year-old woman and her deceased brother.
(14) To determine the relationship between so-called "diastrophic variant" and diastrophic dysplasia, four patients considered to have the variant condition were studied in detail and compared to 67 patients (including 17 sets of affected sibs) considered to have classical diastrophic dysplasia.
(15) The affected sib pair method revealed that in asthmatic families chi 2 = 4.9 (no significance) and in DF-specific IgE positive families chi 2 = 6.2 (p less than 0.05).
(16) CP proband frequencies of .004 for maternal half sibs and .009 for the paternal counterparts were also found.
(17) There is an early-onset form (with onset of symptoms under 2 years of age) where the illness is milder but more persistent, and where there is frequent occurrence of myasthenia in sibs.
(18) The increase is found with estimates of h2 based both on offspring mid-parent regression and on half sib analyses, but may be more marked with the former.
(19) Cumulative risk estimates were 26% for sibs born after the proband and 11% for sibs born before the proband (p less than 0.001).
(20) The one in three risk of spondylolysis to near relatives of patients with the dysplastic form of spondylolisthesis is emphasised in order that the deformity in their sibs and children can be recognised at any early age.