- 更多网络例句与卵核分裂相关的网络例句 [注：此内容来源于网络，仅供参考]
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One of two sperm get into an archegonium and fused with egg. The nucleus of fertilized egg began to divide, and the walls were formed after the third division. The eggs without fertilization divided two times and then disappeared.
雄配子体产生的两个精子中的一个进入颈卵器与卵细胞结合形成受精卵，受精卵核到第3次分裂形成细胞壁，没有受精的卵细胞还要进行两次有丝分裂后才消失。
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And the research materials were often meiotic pachytene chromosomes of sex gland and mitotic prometaphase of early embryos and diapause eggs\' somatic cells.
早期，家蚕染色体识别和基因定位研究主要利用性腺减数分裂粗线期的染色体、早期胚胎和滞育卵有丝分裂早中期的染色体作为材料，按照相对长度和部分限性易位系统或缺失等来进行核型分析。
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It takes about 0.5 h for a pollen tube from germination to arrive at the micropyle. About 0.5 h after pollination, the pollen tube releases two sperms into one synergid. At 0.5-2.5 h after pollination, the egg cell fuses with one sperm to form a zygote. About 10.0 h after pollination, the division of the zygote begins. The duration of the zygote lasts about 2.5-10.0 h. However, one sperm nucleus fuses with two polar nuclei at 1.0-3.0 h after pollination, and 5.0 h after pollination the primary endosperm nucleus begins to divide.
水稻受精过程经历的时间表如下：授粉后，花粉在柱头萌发；花粉萌发至花粉管进入珠孔大约需要0.5小时；授粉后0.5小时左右，花粉管进入一个助细胞，释放精子；授粉后0.5-2.5小时，精卵融合形成合子；授粉后约10.0小时，合子第1次分裂，合子期为授粉后2.5-10.0小时；授粉后1.0-3.0小时，精核与两极核融合；授粉后约5.0小时，初生胚乳核分裂。
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The cleavation rates and blastocyst development rates of cloned embryos were used to assess the efficiency of different operational procedure. Finally, the best combination of operational procedure, that the spindle-viewer system was used for oocytes enucleating, and donor cell was electrofused into ooplasm by electrical pulse (1.9 kV/cm, 10 ms, two) to reconstruct bovine cloned embryos.
以核移植胚胎的卵裂率、囊胚发育率作为检测指标，对不同的方法所获得的克隆胚胎的卵分裂率与囊胚发育率进行比较，最后筛选获得1个优化的牛体细胞核移植操作程序，即采用Spindle view系统对牛卵母细胞进行去核操作，将供核体细胞注射到卵周隙，然后通过电融合法将供体核引入去核卵细胞质(电融合参数为1.9 kV/cm，脉冲时程10 ms，方波2次间隔2 s)。
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In conclusion, these results suggested that (1) the ageing-associated decline in fertility of female KM mouse was due to a decrease in both quantity and quality of oocytes;(2) the ooplasm from young mice did not correct the meiotic errors of aged mice, and the ooplasm from aged mice did not induce abnormal segregation of meiotic chromosome of young mice, indicating that meiotic anomalies found in the oocytes of aged mice might be related to nucleus or chromosomes and relevant factors;(3) a critical nucleocytoplasmic ratio was essential for normal maturation and segregation of meiotic chromosomes of oocytes and development to 2-cell embryos.
本研究结果表明：（1）昆明白小鼠与衰老相关的生育力下降是其卵母细胞数量减少和质量下降的综合结果；（2）年轻小鼠卵母细胞细胞质不能纠正老龄小鼠GV的减数分裂错误，老龄小鼠卵母细胞细胞质也不诱导年轻小鼠的GV发生减数分裂错误，老龄小鼠卵母细胞减数分裂异常很可能与细胞核或染色体及其相关因素有关；（3）关键的核质比对卵母细胞正常的成熟、减数分裂染色体分离及2-细胞期胚的发育是绝对必需的。
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The results showed that the rates of mature oocyte were 75.2％, 73.1％, 69.8％, 63.5％and oocyte at telophase of MI were 16.3％, 15.9％, 16.9％, 27.0％, respectively. The rates of maturation of oocytes cultured in TCM199 with serum, EGF and TGFαwere significantly higher than that of with BSA team (P＜0.05) and the number of oocyte stayed at telophase of MI in TCM199 with serum, EGF and TGFαteam were significantly less than that with BSA team(P＜0.05); Significant higher rates (66.6％, 66.6％, 73.6％) of normalα-tubulin distribution in oocytes cultured in TCM199+ serum, EGF and TGFαwere compared to that of TCM199+BSA(43.3％)(P＜0.05). The rates of oocyte with cortical granules in cortex were 58.8％, 33.9％, 54.7％and 47.9％respectively, there was significant difference between oocytes cultured with serum, EGF and BSA(P＜0.05). In conclusion, TGFαand EGF can promote the oocyte nuclear transition from telophaseⅠto metaphase of meiosisⅡ, and improved the expression and distribution ofα-tubulin during the ovine oocytes maturation; EGF and serum could promote oocyte cytoplasm maturation. The results suggested that EGF and TGFαmight substitute some substance in serum to improve the quality of oocyte nucleus maturation in vitro, but EGF might be more functional than TGFαto promote the maturation of ovine oocyte ooplasm.
三、EGF和TGFα对卵母细胞成熟的影响未成熟卵母细胞分别在TCM199基础培养液+血清、TCM199基础培养液+BSA+EGF、TCM199基础培养液+BSA+TGFα和TCM199基础培养液+BSA四组成熟培养系统中成熟培养，22小时后上述各组卵母细胞的核成熟率分别为75.2％、73.1％、69.8％、63.5％，处于第一次减数分裂末期的比率分别为16.3％、15.9％、16.9％、27.0％，在添加血清、EGF、TGFα各组中核成熟率显著高于其它各组(P＜0.05)，处于末期的比例明显低于其它各组(P＜0.05)：添加血清、EGF、TGFα各组在a-Tubulin蛋白的分布与表达上(66.6％、66.6％、73.6％)明显高于BSA组的正常率43.3％(P＜0.05)；各组CG发生迁移较好的卵母细胞的比率分别为58.8％、33.9％、54.7％、47.9％，血清组和添加EGF组CG迁移至皮质区的比例明显高于仅添加BSA处理组(P＜0.05)。
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Most of the a-sexual embryo sacs also parthenogenetically developed into asexual seeds,which is the same as that of their maternal parent.
此外，平邑甜茶也形成次生极核，并在卵分裂前，形成胚乳游离核；而卵的发育，无论受精与否都要经过3-5天休眠后分裂，并逐渐形成小球形胚、子叶胚。
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The fertilization was processed by sperm in mature male gametophyte combining with egg cell on the top of archegonia on June 15 or so.
摘要樟子松发育成熟的雄配子体中的精子6月15日左右在颈卵器中上部与卵细胞结合，进行受精作用，其后，受精卵进行游离核分裂，形成8个子核时，开始形成细胞壁。
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In the present study, we collected cumulus cells oocyte complex from ovaries of two different strain mice. The cumulusenclosed oocytes were cultured for 6 h in MEM supplemented with growth factor and FSH. The meiotic maturation of these oocytes has progressed to pro-metaphse Ⅰ stage and the condensed chromosomes are visible under DIC microscope, metaphase Ⅰ spindle even can be detected under Polscope. The metaphase Ⅰ spindles of oocytes were exchanged under such microscopes. After electric stimuli, 91. 6% and 91. 6% karyoplasts-cytoplasm pairs were fused respectively. The resulting oocytes were cultured further in MEM and over 80% of oocytes released the first polar body. 79% and 77% of oocytes formed two pronuclei after in vitro fertilization and the embryos were cultured in KSOM supplemented with amino acids. Over 60% of embryos developed to blastocyst stage.
在本研究中我们在取得两种不同品系小鼠的卵丘卵母细胞复合体后，先将卵丘卵母细胞复合体置于含有多种生长因子和激素的MEM培养液中培养6小时，此时卵母细胞已进入第一次减数分裂的前中期，并且在DIC倒置显微镜下可以看到浓缩的染色体，用Polscope可以发现明显的纺锤体，借助这种显微镜通过显微操作将两种不同品系小鼠来源的卵母细胞的MI纺锤体进行互换，经过三次直流电脉冲作用后，分别有91.6％的胞质—MI核质体对融合，经过进一步的培养后，超过80％的重组卵母细胞排出第一极体，体外受精后分别有79％和77％的重组卵形成双原核，受精后的胚胎在KSOM胚胎培养液中体外培养4天后，超过60％的胚胎发育至囊胚。
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Most sperm nuclei eventually developed into the male pronuclei, just like the normal sperms, except sperm nuclei in a few zygotes kept dense throughout the fertilization process. Dense chromosome body was seen at the nuclear area during the prophase of first mitosis, and in the middle of spindle at metaphase of first mitosis.
精子入卵后形成精核，大多能够逐渐解凝、液化并膨大，最终形成形态正常的雄性原核，但在第一次卵裂早期退化成浓缩的染色质小体，并在胞质分裂时随机地分配到其中一个子细胞里的分裂沟附近。
- 更多网络解释与卵核分裂相关的网络解释 [注：此内容来源于网络，仅供参考]
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blastoderm：胚盘
现在来看果蝇(Drosophila)的例子:在果蝇的早期胚胎发育中,最初一些有丝分裂并 不伴有细胞分割.经过几次核分裂后,细胞核移到胚的表面,形成胚盘(blastoderm).其 中少数几个核位于卵后端的极细胞质(pole plasm)中,在这些核的周围立即形成细胞膜,
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oogonium：藏卵器
进行有性生殖时,部分菌丝细胞分化为雄器(antheridium)和藏卵器(oogonium)两种配子囊,二倍体细胞核在发育的雄器和藏卵器中发生减数分裂,产生单倍体细胞核;雄器和藏卵器先是以配子囊接触交配的方式进行质配,两个单倍体细胞核在藏卵器中进行核配,
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Oogonium,Ovogonium：原卵细胞
卵子发生 Oogenesis | 原卵细胞 Oogonium,Ovogonium | 卵核分裂 Ookinesis
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reduction division：减数分裂
减数分裂(Reduction division) Van Beneden(1883)发现当蛔虫的卵在受精时雄虫精子的两个染色体和卵子细胞 核的两个染色体联合,形成具有四个染色体的合子的新细胞核.
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meroblastic egg：不全裂卵;偏裂卵
局部分裂的;偏裂卵 meroblastic | 不全裂卵;偏裂卵 meroblastic egg | 剩余精核 merocyte
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ookinesis：卵核分裂
卵原细胞 oogonium | 卵核分裂 ookinesis | 透螟 oolemma
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ookinete：合子运动期;动合子
卵核分裂 ookinesis | 合子运动期;动合子 ookinete | 卵黄膜;明带 oolemma
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ookinete：合子运动期
卵核分裂 Ookinesis | 合子运动期 Ookinete | 卵黄膜,昆虫 Oolemma
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oolemma：透螟
卵核分裂 ookinesis | 透螟 oolemma | 卵巢切除术 oophorectomy
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segmentation sphere：卵割球
卵割核 segmentation nucleus | 卵割球 segmentation sphere | 卵割;分裂;环节形成 segmentation; cleavage