(a.) Having the head, thorax, and abdomen separated by a deep constriction.
Example Sentences:
(1) However, no mutagenic effects of amitrole were observed either in the sex chromosome non-disjunction test (females reared on medium containing amitrole at 10 ppm) or in the sex-linked recessive lethal test (males reared on medium containing amitrole at 10 ppm).
(2) Meiosis is too complex to have arisen at once full blown and a stepwise scheme is proposed for its evolution, where each step is believed to have provided an immediate selective advantage: (1) The first step in this tentative sequence is the development of a haploidization process by means of a rapid series of mitotic non-disjunctions, turned on under conditions where haploidy is favored.
(3) This synchronization of dissimilar perceptions brings together disjunctive and conjunctive categories dominated by such coordinate conjunctions as "and... and", in the living diachronic discordance.
(4) Both sets of conditions lead to the induction of mutation to antibiotic resistance, mitotic gene conversion, crossing-over and mitotic chromosomal non-disjunction.
(5) Such presynaptic activity was still evident on nerve terminals disjuncted from the synapse by enzymatic treatment prior to incubation in the conjugate.
(6) In studies on non-disjunction, detailed genetic analysis of the induced changes is possible, and these may shed light on the mechanisms involved.
(7) It is concluded that further studies in twins are necessary to prove the not yet solved problems of non-disjunction and double ovulation.
(8) By the same test technique, primary non-disjunction and chromosome loss, the M-type was studied in the eight sub-lines.
(9) The possible assoication between altered sequence of centromere disision and non-disjunction needs further confirmation.
(10) Analysis of the segregation of a marker chromosome indicated that sister chromatid loss (1:0 segregation) and sister chromatid non-disjunction (2:0 segregation) contributed equally to chromosome missegregation.
(11) BIK1 function is required for nuclear fusion, chromosome disjunction, and nuclear segregation during mitosis.
(12) Two mutants due to gene conversion but no mutants due to non-disjunction were detected.
(13) The present study confirms the increase in meiotic errors with age of mother; moreover, increasing age of the father seems to enhance non-disjunction in spermatogenesis.
(14) Such regions, termed "Disjunction Regulator Regions" (DRR), have been implicated in the regulation of X-chromosome segregation (Goldstein, P., The synaptonemal complexes of Caenorhabditis elegans: Pachytene karyotype analysis of the Dp 1 mutant and disjunction regulator regions.
(15) As genetic endpoints dominant lethality, chromosome aberrations (detachments) and non-disjunction were studied.
(16) This suggested that the white, cycloheximide resistant, leucine requiring colonies arose by mitotic non-disjunction and not only by two coincident mitotic crossing over events.
(17) Since in the trisomic cell line of the father and the son the extra chromosome 21 seems to be the same, a predisposition toward mitotic errors (non-disjunction or anaphase lagging) may be postulated, leading to the recurrent gain or loss of a specific chromosome 21.
(18) A review of the reproductive histories of five cases with trisomy 9pter yields 9q21 or 22 indicate that the balanced translocation mothers of these infants may have as high as a 23% chance of producing a chromosomally unbalanced offspring due to 3:1 disjunction.
(19) The frequency of satellite association of two different acrocentric variants in two trisomic mongols was studied taking in consideration the possible relationship of these chromosomes in the etiology of non-disjunction events.
(20) These observations indicate a high degree of mitotic instability and thus raise the question of the effect of premature centromeric disjunction on mitotic instability of dicentric chromosomes.
Isolated
Definition:
(imp. & p. p.) of Isolate
(a.) Placed or standing alone; detached; separated from others.
Example Sentences:
(1) A series of human cDNA clones of various sizes and relative localizations to the mRNA molecule were isolated by using the human p53-H14 (2.35-kilobase) cDNA probe which we previously cloned.
(2) On the other hand, human IL-9, which is a homologue to murine P40, was cloned from a cDNA library prepared with mRNA isolated from PHA-induced T-cell line (C5MJ2).
(3) Open field behaviors and isolation-induced aggression were reduced by anxiolytics, at doses which may be within the sedative-hypnotic range.
(4) The ability of azelastine to influence antigen-induced contractile responses (Schultz-Dale phenomenon) in isolated tracheal segments of the guinea-pig was investigated and compared with selected antiallergic drugs and inhibitors of arachidonic acid metabolism.
(5) One thing seems to be noteworthy in their opinion: the bacterial resistance of the germs isolated from the urine is bigger than the one of the germs isolated from the respiratory apparatus.
(6) Thus, saponin and ammonium chloride can be used to isolate whole infected erythrocytes, depleted of hemoglobin, by selective disruption of uninfected cells.
(7) Detergent-solubilized HLA antigens were isolated from a human lymphoblastoid cell using an anti-beta2-microglobulin immunoaffinity column.
(8) A phytochemical investigation of an ethanolic extract of the whole plant of Echites hirsuta (Apocynaceae) resulted in the isolation and identification of the flavonoids naringenin, aromadendrin (dihydrokaempferol), and kaempferol; the coumarin fraxetin; the triterpene ursolic acid; and the sterol glycoside sitosteryl glucoside.
(9) The present findings indicate that the deafferented [or isolated] hypothalamus remains neuronally isolated from the environment if the operation is carried out later than the end of the first week of life.
(10) Proliferation assays using F3 showed that 15 (14 CD4+ and 1 CD8+) of the 18 isolated clones were specific for T. gondii.
(11) Similar to intact crayfish, animals with an isolated protocerebrum-eyestalk complex, exhibit competent circadian rhythms in the electroretinogram (ERG).
(12) Reiteration VII (within protein coding regions of genes US10 and US11) and reiteration IV (within introns of genes US1 and US12) were stable between the isolates (group 1).
(13) The role of O2 free radicals in the reduction of sarcolemmal Na+-K+-ATPase, which occurs during reperfusion of ischemic heart, was examined in isolated guinea pig heart using exogenous scavengers of O2 radicals and an inhibitor of xanthine oxidase.
(14) The agent present in the serum which causes dissolution of the fibrin clot was isolated and identified as pepsinogen.
(15) Completeness of isolation of the coronary and systemic circulations was shown by the marked difference in appearance times between the reflex hypotensive responses from catecholamine injections into the isolated coronary circulation and the direct hypertensive response from a similar injection when the circulations were connected as well as by the marked difference between the pressure pulses recorded simultaneously on both sides of the aortic balloon separating the two circulations.4.
(16) At the same time the duodenum can be isolated from the stomach and maintained under constant stimulus by a continual infusion at regulated pressure, volume and temperature into the distal cannula.
(17) Only the approximately 2.7 kb mRNA species was visualized in Northern blots of total cellular and poly(A+) RNA isolated from cardiac ventricular muscle.
(18) These major departmental transformations are being run in isolation from each other.
(19) This postulate is supported by a limited study of the serovars present among the isolates.
(20) Plasma membranes were isolated from rat kidney and their transport properties for sodium, calcium, protons, phosphate, glucose, lactate, and phenylalanine were investigated.