受精卵

However, if a Y-chromosome is present , it stimulates the undifferentiated gonadal cell mass to develop into testicles .

然而，如果受精卵中存在Y染色体，它会调控未分化的生殖细胞团发育成睾丸。

Long treatments(7–43 min — about three quarters of the period of meiosis I in triploid eggs). yielded only heptaploid cells among the embryos.

在抑制三倍体受精卵第一极体（PB1）过程中，处理时间的不同对后代四倍体的得率有明显影响。

The hybrid between Brachymystax lenok and Hueho taimen were not a live in the past 2 years. However, the fertility and eyed rate of BH were significantly higher than that of HH and BB (P.05), while the hatching rate were significantly lower (P.05). The larvae died within 1 to 2 hours after hatching. It was observed that the tail of yolk-sac larve couldn't stretch around the yolk, and there were hyperemia in the middle and posterior segment of the tail. The reason why the hybrid between Brachymystax lenok and Hucho taimen couldn't snrvive might was the karyoplasms of the gametes from Brachymystax lerwk and Hucho taimen by distant hybridization were not compatible.

细鳞鲤×哲罗鱿的杂交经过2年多批次实验均未得到成活杂交子代，但在胚胎发育阶段BH的杂交受精率、发眼率均显著高于双亲自繁对照组(P.05)，但其孵化率显著低于双亲对照组(P.05)，BH杂交子代在破膜后1~2h内即死亡，刚破膜的仔鱼尾干中后段至尾鳍部分盘绕于卵黄囊表面不能伸展，且所有破膜仔鱼的尾干中后段均存在充血点，本研究认为，这种反交［细鳞鲑×哲罗鲑］子代不能成活的原因可能是由远缘杂交受精卵核质不相容所导致。

Xpression of TGFαand EGFR protein in oocytes, preimplantation embryos and reproductive tracts by immunohistochemy 2.1 Expression of TGFαand EGFR protein in oocytes and preimplantation embryos The results showed that expression of EGFR and TGFαwere in immatured and matured oocytes, cumulus cells, fertilized oocytes and different stage of preimplantation embryos.

GFR和TGFα在未成熟卵母细胞、卵丘细胞和成熟卵母细胞的细胞膜区域均有表达，TGFα在受精卵中的表达量明显增加。

Compared with most other freshwater fishes, the time needed for the embryonic development of Lepomis cyanellus was shorter.

此外，发现经过脱膜处理或低温（6～8℃）处理（时间不超过2h）的受精卵的发育并没有受到影响。

Mitogen-activated protein kinase cascade and maturation-promoting factor play very important roles during meiotic maturation and fertilization of oocyte.

目的探讨有丝分裂促进因子和丝裂原活化的蛋白激酶在小鼠受精卵第一有丝分裂期中的作用及相互关系。

Of or relating to a twin or twins developed from the same fertilized ovum and having the same genetic makeup and closely similar appearance; monozygotic.

同卵双生的从同一受精卵中产生的，具有相同基因结构和相似外貌的孪生子的；单卵的

Biology Of or relating to a twin or twins developed from the same fertilized ovum and having the same genetic makeup and closely similar appearance; monozygotic.

同卵双生的：从同一受精卵中产生的，具有相同基因结构和相似外貌的孪生子的；单卵的

The results showed that : 1 During nonbreeding season, the giant panda′s ovary was still rich with large and small follicular oocytes, and the large follicular oocytes could be matured in vitro; 2 The mean diameter of the oocytes was (141±6.7)μm and lots of cortical granules contained in the cytoplasm of oo...

结果表明∶（1）在非繁殖季节，大熊猫卵巢中小腔及大腔卵泡卵母细胞仍较丰富，其大腔卵泡卵母细胞可在体外培养成熟；（2）大熊猫的卵母细胞平均直径为（141±6.7）μm ，其胞质富含卵黄颗粒；（3）自配 PandaI I号获能液（含丙酮酸钠、肾上腺素等）可使大熊猫精子有效获能；（4）大熊猫卵母细胞体外受精后，经培养可观察到第2 极体，有的受精卵开始发生卵裂。

However, the actual realization of what is only potentially present in the fertilized egg is largely dependent upon factors which are active during ontogenesis.

但是，真正有可能在受精卵出现的时候，适一存在个体发生的过程中。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！