查询词典 bivalents

Moreover, the distinguised advantages of applying the bivalents instead of somatic chromosomes to carry out the studies of fish gene mapping were discussed in details, and a few of new tentative ideas about how to develop the gene mapping in fish deeply were primarily postulated and theoretically analyzed in this paper.

此外，还详细讨论了以鱼类二价体替代体细胞染色体开展基因定位研究的突出优点与必要性；地高辛标记原位杂交技术和PRINS技术的特色与应用潜力；染色质风韵与等同区等新概念；以及如何深入开展鱼类基因定位研究的新设想。

Cytologic results showed that chromosome numbers of root cell are 2n 56, and 28 bivalents can be observed at PMC MI in the six 8x Trititrigia.

细胞学鉴定结果表明，6个八倍体小偃麦的根尖细胞染色体数目为2n=56，花粉母细胞减数分裂中期Ⅱ染色体构型为2n=28Ⅱ，具有高度的细胞学稳定性。

The events occurring during these stages differ in meiosis and mitosis, notably in that bivalents (pairs of homologous chromosomes) are formed in meiosis, whereas homologous chromosomes remain separate in mitosis.

在减数分裂和有丝分裂中，前期发生的事件是不同的，尤其是二价染色体区别最为明显，在减数分裂中形成，而在有丝分裂中同源染色体是分离的。

There was no abnormal behavior observed in meiotic chromosomes in carrot. It has simultaneous cytokinesis. There are nine bivalents (9II) at metaphase I, indicating it is a typical diploid species.

通过观察胡萝卜花粉母细胞的减数分裂过程，发现其行为正常，是同时型胞质分裂，中期Ⅰ有9个二价体(9Ⅱ)，为典型的二倍体物种。

The dark bands alternating with light bands,relatively stable and R-band-like structure was showed on the pachytene bivalents of Rics-field eelby using the random-primed in situ digoxigenin-labelled DNA synthesis technique,and the results were analysed and discussed in detail.

在黄鳝二价染色体上，运用地高辛配基标记的随机引物原位DNA合成技术诱导出了明暗相间、基本稳定且类似于R带的带状结构。本文对该结果进行了较详细的分析和讨论。

Its chromosome number was 42, and 21 bivalents could be observed at PMC MI. FISH analysis by using genomic DNAs from S. cereale and genomic DNAs from L.

染色体观察结果表明，山农030-1根尖染色体数目为42，花粉母细胞减数分裂中期I染色体构型为2n=21Ⅱ。

Under normal temperature (25-30℃), the process of pollen mother cell meiosis is normal; The most of chromosomes become bivalents which like "V","O","Y","X", sticks and dots, and mainly like dots,"V" and "O"; and a few of univalent (0.79% of Tainong 1 and 0 of Irwin) and multivalent (4.76% of Tainong 1 and 3.57% of Irwin) had been observed.

常温（25~30℃）条件下，花粉母细胞减数分裂过程较为正常，双线期染色体主要形成二价体，二价体构型以&V&型、&O&型、&Y&型、&X&型、点状和棒状等形式存在，并以点状、&V&型和&O&型较多见，出现少量的单价体和多价体，其中台农1号为0.79%和4.76%，Irwin为0和3.57%；同时仅在少量中期Ⅱ和后期Ⅱ花粉母细胞中观察到落后染色体。

Kamoji F1 × Chinese Spring also ranged from 55 to 63; however, many bivalents at MI of PMC and fertile pollen were observed resulting in partial fruitfulness in some BC1 plants by self-crossing. A plant (2n=63) with 42 wheat chromosomes and 21 R. kamoji chromosomes was obtained from R.

在F1中有1株穗型趋向中国春，其染色体数目为2n=63，经染色体分子原位杂交检测，含有42条小麦染色体和21条鹅观草染色体。

In meiosis of pollen mother cells of the tetraploids and the hexaploids, only bivalents were observed in most of the populations, although in several populations or individuals a few univalents or tetravalents appeared. In the hexaploids, hexavalents were not observed.

四倍体和六倍体的花粉母细胞减数分裂染色体构型在大多数居群都为二价体(四倍体中30个二价体，六倍体中45个二价体)，少数居群或是个体除二价体为主外还出现单价体和四价体，六倍体类型没有出现六价体构型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。