;The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.
果蝇胚胎
发育是由四种系统，分别控制
尾部、前部、后部以及背腹部形成。
The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.
果蝇胚胎发育是由四种系统，分别控制尾部、前部、后部以及背腹部形成。
Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.
目探讨卵
第一极体形态与原核期受精卵形态、卵裂期胚胎
系。
Conclusion The electrofusion efficiency may he improved by inserting more somatic cells into PVS when the somatic cells have a low electrofusion efficiency with oocytes.
结论低融合效率体与卵母电融合时可通过增加PVS中体数目来提高融合效率。
The secondary oocyte now divides again into two new cells of unequal size: a relatively large ootid (mature egg cell) and a minute second polar body.
此时，次级卵母又分裂成两个大小不对等新：一个相对很大卵子（成熟卵）和一个微小次级极体。
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