减数

Based on the biology model, leek is put in the normal paint or water-based environment. Since the ratio of microkernel is directly proportional to damage, the pollution can be assessed through the permillage of microkernel.

通过实验建立起生物学模型，将处于减数分裂时期的韭菜花放入涂有油漆和水性漆的环境中，其花粉细胞常发生突变，而在正常环境中的韭菜花的花粉细胞突变较少。

Before ovulation, primary oocytes complete the first meiosis produce a secondary oocyte and a polar body.

在排卵前，初级卵母细胞完成第1次减数分裂产生次级卵母细胞和第1极体。

As with the male gametes the remaining cytoplasma binding serves the synchronization of the division and maturation of the cells: just as for the 1rst polar body at the time of the termination of the 2nd meiosis.

和雄性配子一样，这些残留的细胞质连接有助于细胞分裂和成熟的同步化：就像第二次减数分裂结束时的第一极体一样。

Clinical featu res: 18-year-old female, 155 cm high, 45 kg weight, uterus: 22×18 ×17 mm, unclear bilateral ovaries, normal pudendum, breast

A： 中期G带图； B：异常染色体核型分析图； C：家系图； D：减数分裂四分体配对模式图。临床表现：女， 18岁，身高155 cm，体重45 kg，子宫大小22

Puna Chicory, leymus multicaulis and Psathyrostachysjuncea.For the materials used in this article were some old seeds which had been stored for 3-7 years, we found a lot of abnormal mitotic and meiotic cells, such as chromosome bridge. chromosome laggard, micronucleus, multipolar division and so on. Moreover, we also found the wheat"s multi-anther, double germinate-hole"s microspore and collected the photos of every period of meiosis. mitosis.

因为用于细胞学检测的小麦材料是搁置多年的陈旧种子，所以在检测染色体数目时，发现大量异常分裂现象，包括染色体桥、染色体落后、微核、多极分裂等；实验过程中还发现小麦多花药现象和花粉粒具双萌发孔的现象；同时在显微观察同时还注意搜集了细胞有丝分裂、减数分裂各个时期的分裂相图片。

Results showed that the PMC meiosis of autotetraploid was similar to the diploid except some particularities. In metaphase Ⅰ, multivalent, quadrivalent, trivalent, bivalent and univalent were observed and some of the chromosomes were found not to rank on the metaphase plate and so did in metaphase Ⅱ cells. In anaphase Ⅰ and anaphase Ⅱ cells, there were lagging chromosomes, chromosome bridge and fragment. During anaphase Ⅱ and telophase Ⅱ, chromosome segregation was not synchronous or equal. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

结果表明，同源四倍体花粉母细胞减数分裂过程与二倍体相比，中期Ⅰ染色体构型复杂，有多价体、四价体、三价体、二价体和单价体；中期Ⅰ及中期Ⅱ有部分染色体没有排列在赤道板上；后期Ⅰ及后期Ⅱ出现落后染色体、染色体桥及断片；后期Ⅱ和末期Ⅱ有染色体不同步分离及不等分裂的现象；四分体时期还出现二分体、三分体、含微核的异常四分体及多分体。

The daughter cells contain half no.of chromosome of the parent cell.Therefore it is also called reduction division.

减数分裂是在进行有性生殖的生物中导致生殖母细胞中染色体数目减半的分裂过程。

The phenological phase of reduction division of pollen mother cells and the morphological character of flo-wer buds at reduction division stage were examined.

观察了苹果二倍体品种金帅和国光减数分裂中期Ⅰ染色体配对和构型，提出了进一步研究这一问题的设想。

The time at which the two reductive divisions occur is not necessarily coincident to the time of ovulation.

两次减数分裂的时间不一定与排卵时间相一致。

In this article, the specific genes of meiosis and pathways are described in these events in Saccharomyces cerevisiae.

本文简述了现已阐明的酿酒酵母减数分裂的重要事件如同源染色体配对、联会、基因重组、染色体分裂和特异性基因。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。