(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.
Geographic
Definition:
(a.) Alt. of Geographical
Example Sentences:
(1) In this article we report the survival and morbidity rates for all live-born infants weighing 501 to 1000 gram at birth and born to residents of a defined geographic region from 1977 to 1980 (n = 255) compared with 1981 to 1984 (n = 266).
(2) The purpose of this paper is to discuss the potential for integrating surveillance techniques in reproductive epidemiology with geographic information system technology in order to identify populations at risk around hazardous waste sites.
(3) Sixty-five conditional PSROs are implementing review in acute care hospitals in their geographic area, and 55 planning groups are developing plans to qualify for conditional PSRO designation.
(4) The typology developed in two previous surveys of illicit heroin products is applicable to many of the samples studied in this work, although significant changes have occurred in the chemical profile of illicit heroin products from certain geographical regions.
(5) The difference in Brazil will be the huge distances involved, with the crazy decision not to host the group stages in geographical clusters leading to logistical and planning nightmares.
(6) The studies reported here examined physical interactions between V. cholerae O1 and natural plankton populations of a geographical region in Bangladesh where cholera is an endemic disease.
(7) Data were weighted to represent the population in this geographic area.
(8) Partially purified VLPs were found to sediment at 183S in sucrose gradients and to cross-react with antibody in acute phase sera from geographically isolated cases of ET-NANBH.
(9) This hypothesis is consistent with recent findings of elastosis of the bowel wall muscles, the distribution of diverticula along the colon, as well as with epidemiological data on the emergence of diverticulosis coli as a medical problem and its geographic prevalence.
(10) There were no significant sex, diagnostic subgroup, or geographic difference in any of the drug parameters measured.
(11) Regarding prostatic cancer, geographical variations are minor and no particular region with an increased or decreased mortality could be identified.
(12) We compared the results with those obtained in other countries in our geographical area.
(13) Indeed, the geographical nature of the division also keeps a check on the club's carbon footprint – Dartford rarely have to travel far outside the M25, with the trips to Bognor Regis and Margate about as distant as they get.
(14) A computer system for probabilistic diagnosis of jaundice was tested on a patient sample from a geographical area different from that for which it was first constructed.
(15) It may be that the low severity of the disease in India, juxtaposed against the high mortality rates in parts of Africa, may be due to the relative prevalence of marasmic and kwashiorkor types of malnutrition in these particular geographic areas.
(16) Epidemiologic studies and careful analysis of nutritional data played an important role in precising the risk represented by alcohol consumption and dietary habits, and characterized the geographical distribution of the disease.
(17) Addresses were not available for 31 pc of patients so that geographical variations could not be determined accurately.
(18) The clinical presentation of the cutaneous lesions and the geographic origin of the infection were consistent with infection by L. b. guyanensis.
(19) (2) E. granulosus, which includes two geographical groups: (a) Northern group, with two sub-species E. g borelis and E. g. canadensis, the life-cycle of which is sylvatic and that are agents of a pulmonary hydatidosis which may affect Man.
(20) The detection of health inequalities in the urban environment and their magnitude depends to a great extent on the internal social coherence of the geographical division used.