(v. t.) To part; to disunite; to separate; to sunder.
(v. i.) To become separated; to part.
Example Sentences:
(1) Recombination between the two normal chromosomes or between the deletion chromosome and a normal chromosome increased the probability that these chromosomes would disjoin, although cosegregation of recombinants was observed.
(2) The correction and disjoining of chains may not be effective in all cells.
(3) The results are described within the framework of Derjaguin-Landau-Verwey-Overbeek (DLVO) theory with reference to electrostatic, van der Waals, and hydration components of disjoining pressure.
(4) Here we show that nonhomologous plasmids, having no detectable DNA sequence cross-hybridization, also tend to disjoin from each other at the first meiotic division.
(5) In many cases, nondisjunction arises from a reduction or elimination of crossing over, leading to the production of homologous univalents which fail to co-orient on the metaphase plate and to disjoin properly.
(6) The female meiotic mutant no distributive disjunction (symbol: nod) reduces the probability that a nonexchange chromosome will disjoin from either a nonexchange homolog or a nonhomolog; the mutant does not affect exchange or the disjunction of bivalents that have undergone exchange.
(7) In the great majority of patients resulting from an error of maternal meiosis there was clear evidence of recombination involving the non-disjoined chromosomes, suggesting that absence of recombination is not an important aetiological factor in non-disjunction of the X chromosome in female meiosis.
(8) The diplotene cells were defined on day 22 by the loss of a complete synaptonemal complex set and by the appearance of disjoined lateral elements and persistent segments of synaptonemal complexes.
(9) Primarily (on day 13 of gestation) the nucleolar components become rather disjoined.
(10) The recombination frequencies on chromosomes 21 that had undergone nondisjunction were then compared to those on chromosomes 21 that had disjoined normally.
(11) In seven of the simple trisomies, information was obtained from both the cytogenetic and molecular markers, making it possible to study recombination between the two non-disjoined chromosomes.
(12) In Drosophila males and females mutant for the ord gene, sister chromatids prematurely disjoin in meiosis.
(13) In strains containing one normal and any one deletion chromosome, the two chromosomes disjoined in most meioses.
(14) In strains containing one deletion chromosome and two normal chromosomes, the two normal chromosomes preferentially disjoined, but in 4-7% of the tetrads the normal chromosomes cosegregated, disjoining from the deletion chromosome.
(15) Homology on one arm was sufficient to direct chromosome disjunction, and two chromosomes could be directed to disjoin from a third.
(16) Recombination between the two normal chromosomes or between one normal chromosome and the deletion chromosome increased the probability that they would disjoin, although cosegregation of recombinants was observed.
(17) The genetic analysis of the exceptions reveals whether nondisjunction has occurred due to failure of the spindle fibres to disjoin chromosomes or attachment of the chromosomes.
(18) The pairs disjoin at anaphase and translocate to opposite poles and the interpolar distance increases.
(19) Recombination events were found in two families with regular trisomy, one occurring between chromosomes 21 that failed to disjoin at maternal meiosis I, the other prior to a paternal meiosis II nondisjunction.
(20) Using the thumb, forefinger and middle finger of the left hand, the skin flap containing the funiculus spermaticus is grasped and dectus deferens is palpated and disjoined.
Disjunctive
Definition:
(a.) Tending to disjoin; separating; disjoining.
(a.) Pertaining to disjunct tetrachords.
(n.) A disjunctive conjunction.
(n.) A disjunctive proposition.
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.