Micronuclei were observed in the tetrad stage.

四分体阶段有微核。

This phenomenon occurs in the early tetrad stage.

这个现象在早期四分体阶段出现。

The micronuclei were not observed in tetrad stage.

四分体阶段无微核出现。

Stability of the complexes shows the "Tetrad effect".

配合物稳定性呈“四分组效应”。

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后。

Microtubule bundles in the tetrad cell radiated from the nucleus.

在细胞质存在一个疏松的微管束网络。

Abnormal development was observed at tetrad and mature embryo sac.

在四分体和成熟胚囊时期观察到了异常发育现象。

In tetrad stage, the structures of tapetal cells begin to dissociate.

四分体时期，绒毡层细胞内部结构开始解体。

At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

四分体时期出现二分体、三分体、含微核的异常四分体及多分体。

The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.

四分孢子的显著特征是细胞核和高尔基体呈活跃状态。

Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.

大孢子四分体为线形，合点端功能大孢子发育成为蓼型胚囊。

The process of pollen abortion begins with vacuole formation and gradual enlargement in the tetrad.

花粉败育的过程从四分体开始，细胞质内液泡逐渐增大，接着细胞器解体，细胞核解体。

The results showed that microspore mother cells and tetrad microspores accumulated numerous lipids but no starches.

结果发现小孢子母细胞和四分体小孢子中积累了一些脂滴，但没有淀粉。

At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.

此时每条染色体由一对染色单体构成，这两条联合的染色体称为四分体。

The microspores are arranged in a tetrahedral tetrad. The mature pollen grains are of the 2-celled and 3-celled types.

小孢子四分体为四面体型排列，成熟花粉有2 -细胞和3 -细胞型2种。

We present our experience with complex vein-anesthesia in 14 patients with Fallot tetrad for total surgical correction.

本地14例法乐四联症根治术的麻醉处理进行了总结分析。

In diplotene the pairs of chromatids begin to separate from the tetrad formed by the association of homologous chromosomes.

双线期时，配对的染色单体开始从四分体中分离，此时常可见染色体交叉。

The Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?

高度演化的黄山A型花岗岩：对扬子克拉通东南部中生代岩石圈减薄的约束?。

In this paper the fine structure of the distribution model of REE in Karst deposits-the tetrad effect and its meaning are discussed.

本文阐述喀斯特沉积物中稀土分布模式的精细结构—稀土四重效应特征及其研究意义。

The merit of viewing the four as a tetrad rather than selecting only three to form a triangle is that it gives greater prominence to quality.

把这四个变量看成是四元的而不是选出三个组合成三角形，它的优点在于：它给质量上带来了很多显著的帮助。

The main pathways of causing empty anther sacs are obvious enlargement and liquidization of tapetum cells from tetrad to slope nucleus early period;

空囊产生的主要途径：①四分体至单核早期绒毡层细胞体积发生明显的增大、液化；

In the framework of Hayashi's gravitation theory with torsion, the general form of parallelism tetrad field in Schwarzshild coordinate system is presented.

在有挠引力理论框架内，给出施瓦西坐标系平行标架场的一般形式。

Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.

大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。

There occurs pollen abortion during the stage from tetrad to single nucleus pollen grain of cytoplasmic male-sterile line in Brassica napus Var. oleifera(Raphanus sativus L. ).

甘兰型油菜萝卜细胞质雄性不育系的花粉败育发生在四分体至单核花粉粒阶段。

Otherwise, the chromosome morphology involving Haynaldia chromatin was observed at preleptotene I, and the frequencies of chromatin nucleus at tetrad stage and at microspore stage were investigated.

此外，观察了前期I的簇毛麦染色体形态，统计了四分体和小孢子中小麦和簇毛麦染色质微核频率。