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   chromosome chromosome 在 生物学 分类中 的翻译结果: 查询用时:0.197秒
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chromosome chromosome
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  染色体
    Different concentrations Pb~(2+) were used separately to treat the root tip of onion 6h、18h、24h, pass rule chromosome press part technology, survey the mitosis of root tip cells of onion, with a bigger concentration of Ph~(2+) the growths of cells were inhibited more obviously and the author moticed lasted chromosome, chromosome, chromosome bridge, mitosis exponent aberrant appearance.
    用不同浓度的硝酸铅(Pb~(2+))溶液分别处理洋葱根尖6h、18h、24h,通过常规染色体压片技术,观察到洋葱根尖细胞的有丝分裂随着浓度的增加和染毒时间的延长,细胞增殖率下降,并且出现了滞后染色体染色体桥、微核等畸变现象。
短句来源
    Anomalous phnomena such as univalent,multiva- lent,lagging chromosome,chromosome bridge,fragment and micronuclei were emerged at the meiotic stage of pollen mother cells of the regenerated plants(R_1). These variations were different in degree in the 5 tested genotypes.
    再生株 R_1花粉母细胞减数分裂过程中出现单价体、多价体、染色体桥、落后染色体、断片和微核等异常现象,并与各基因型细胞遗传程度上差异有关。
短句来源
    The single chromosome and the majority of chromosomes scattered outside the equatoria plate, lagging chromosome, chromosome bridges and micronuclei were found in meiosis. Average rate of variation is 6. 29%.
    减数分裂过程中还见到单个或多数染色体游散于赤道板外,落后染色体染色体桥和微核等异常,平均变异率6.29%。
短句来源
    YR-cohesion chromosome model will give a better answer to the questions such as exchange,centromere,holocentromere,synaptonemal complex,polytene chromosome,puff,lampbrush chromosome,chromosome banding,non-segregation of sister chromatid,pollentube pathway and biological evolution.
    YR -染色体模型能自然、合理地解释所有遗传现象 ,如交换、着丝粒、全身着丝粒或弥散型着丝粒染色体、同源染色体联会及联会复合体的中央区、多线染色体与膨突、灯刷染色体染色体分带、姊妹染色体由前期到中期不分开、花粉管会导入外源遗传物质、高等生命是怎样从原始生物进化而来的等等。
短句来源
    Diffenently concentrated Se~ 4+ were used separately to treat the root tip of onion,the result shows that with a bigger concentration of Se~ 4+ the growths of cells were inhibited more obviously,the mitosis co-efficients were decreased. Besides,during the study on mitosis process of the root tip cells of onion,through normal squashed specimen it was noticed that there occured lasted chromosome,chromosome bridge and other abnormal phenomena.
    用不同浓度的亚硒酸钠 (se4+ ) ,分别处理洋葱根尖 ,结果表明随浓度的增加和染毒时间的延长 ,有丝分裂指数逐渐下降 ,且在此过程中还出现微核、染色体滞后、染色体桥等畸变现象 .
短句来源
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  chromosome chromosome
Chinese hamster ovary (CHO) cells were cotransfected with pSV2-neo and genomic DNA from a CHO ×human cell hybrid containing a single human chromosome (chromosome 11).
      
BothOVP1 andOVP2 are mapped on the same chromosome (chromosome 6) to a distance of ca.
      
Only Segment I of the sex chromosome (Chromosome A) shows marked differences.
      
Of 36 monkeys examined, five females showed heterozygotic 'marker' chromosome (chromosome 9).
      
We have isolated and characterized the smallest chromosome (chromosome 1, 980 kb) to elucidate the fundamental molecular organization of a plant-type chromosome.
      
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The Giemsa C-banding procedure was successfully modified to stain the nucleolus by prestaining the root tips with 1% aceto-carmine for two to three days before squashed. After band differentiation, the nucleolus was positively stained, and the hands and heterochromocenters remained their speciality and good resolution. Two pairs of chromosomes (chromosome Ⅵ and Ⅷ) were banded in the genome of maize line DMo-17. Four heterochromocenters appeared in the interphase cells correspondingly.With the band...

The Giemsa C-banding procedure was successfully modified to stain the nucleolus by prestaining the root tips with 1% aceto-carmine for two to three days before squashed. After band differentiation, the nucleolus was positively stained, and the hands and heterochromocenters remained their speciality and good resolution. Two pairs of chromosomes (chromosome Ⅵ and Ⅷ) were banded in the genome of maize line DMo-17. Four heterochromocenters appeared in the interphase cells correspondingly.With the band closely neighbouring the secondary constriction of chromosome Ⅵ (NOR-chromosome) as marker, it was found that both NORs in all the root tip cells were active and participated in nucleolus formation, and that uucleolus was exclucively associated with the banded NOR-chromosome (s) in mitotic as well as in interphaae cells.In cells with single nucleolus, the nucleolus was always associated with the pair of bands or heterochromocenters on the NOR-chromosomes but not with those on chromosome Ⅷ. It was clear that the single nucleolus was actually a fused body which was made up by the two NOR contributors.In cells with double nucleoli, it was observed that each nucleolus was always related with a single band or heterochromocenter on one of the NOR-chromosomes, but not with those on chromosome Ⅷ. It was apparent that one NOR-chromosome was responsible for one nucleolus formation in this type of cells. The one for one relationship provided us a direct explanation to Gates' dogma that the maxium number of nucleoli in a species was contant and equale to the number of secondary constrictions in the genome.It was also observed, in the cells with double nucleoli, that the two "nucleolus-band" structures were constructed in a polarized manner, with a band or heterochromocenter joining to the small end of a pearlike nucleolus. The two polarized structures were in a parallel distribution and oriented in the same direction inside the nucleus. This could be interpreted alterlatively by: 1) the chromosome arrangement within the interphase and prophasc still remained the telophase configuration in the mother cell; 2) the parallel distribution and the one-direction orientation could, with some unknown mechanism, have prevented the two polarized stuctures from fusing into a complex one.

通过增加醋酸洋红前染色,使核仁在染色体分带之后也能着上颜色。用这一改良的Giemsa分带程序,本文研究了核仁与NOR-染色体的联系。发现玉米根尖细胞中两个近次缢痕带或异染色中心总是与前期和间期核仁紧靠在一起,两个核仁组织者都表现出形成核仁的活性。在单核仁细胞中,核仁总是同时与两个带或异染色中心相联系,可见这个核仁是由两个核仁组织者共同参与形成的;在双核仁的细胞中,每个核仁分別与并且仅与一个带或异染色中心相联系,可见每个核仁组织者各形成一个核仁,这两个核仁在核中常呈同向平行排列。

 
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