essay 評判：线虫的分子发展史分析
essay 評判：线虫的分子发展史分析
后轴是由在c中的精子决定的，线虫将被认为对极性非常重要的PAR蛋白定位。精子的紫菀也扮演着重要的角色，并建立了标准的对称性。线虫胚胎发生始于成熟卵母细胞在减数分裂前期被保留，并通过精子在精子鞘中受精。在受精完成后，两个双极体的挤压和壳质就像保护蛋壳一样，将胚胎限制为卵形。在线虫中，在精子定向细胞质安排的授精阶段，对AP不对称进行鉴定。
essay 評判：线虫的分子发展史分析
该过程分离了关键因素，如P颗粒从未裂解的胚胎。在其他线虫物种中发现了AP不对称:细胞质的运动不能被发现，P颗粒有不同的分离，而AP不对称是由精子指定的。尽管存在这些差异，从两个细胞到两个物种的发展几乎是相似的(Goldstein, Frisse & Thomas, 1998)。摘要通过对30种线虫物种的生长进行测定和评价，并对线虫的分子发展史进行了分析，从而重建了进化的历史。结果表明，本文提出了一种与线虫有关的轴向规范的新方法。线虫卵的细长轴描述了线虫体的后后轴。
essay 評判：线虫的分子发展史分析
The anterior-posterior axis is determined by the sperms in C. The Elegans localize the PAR proteins which are considered as very much important for the polarity. The sperm asters also play a major role and the establishment of the PAR symmetry is seen. C. Elegans embryogenesis starts when the mature oocyte is detained in the prophase of the meiosis I and is fertilized in sperm theca by the sperm. After the fertilization is accomplished, the extrusion of the two bipolar bodies and the chitin like protective eggshell is being made, and it limits the embryo to an ovoid shape. In Caenorhabditis Elegans, the identification of AP asymmetry is done at the fertilization stage in which the sperm directs the cytoplasmic arrangements.
essay 評判：线虫的分子发展史分析
The process separates the key factors such as the P granules from the uncleaved embryo. It has been found that the AP asymmetry is produced in the other nematode species: the movements of cytoplasm cannot be found, P granules are differently segregated, and AP asymmetry is specified by the sperm. Despite of these differences, the development from two cells to two species is almost similar (Goldstein, Frisse & Thomas, 1998). The evolutionary history has been reconstructed by determining and evaluating the growth of thirty nematode species and analyzing the outcomes by the molecular phylogeny of nematodes. The result shows that a new method for the axis specification has been developed which is related to C. elegans. The C. elegans eggs’ elongated axis describes the anterior-posterior axis of the body of the nematode.
