The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎发育种系统，分别控制头尾部、前部、后部以及背腹部形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段背腹径最长，可分为背部和腹部，两部分细胞分界清晰。

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，分别控制头尾部、前部、后部以及背腹部形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段背腹径最长，可分为背侧部和腹侧部，两部分细胞分界清晰。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎的发育是由四种系统，别控制头尾部、前部、后部以及背腹部的形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段的背腹径最，为背侧部和腹侧部，两部的细胞界清晰。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎的发育是由四种系统，分别控制头尾、前、后以及的形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段的径最长，可分为侧和侧，两分的细胞分界清晰。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇发育是由四种系统，分别控制头尾部、前部、后部以及背腹部形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段背腹径最长，可分为背侧部和腹侧部，两部分细胞分界清晰。

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，别控制头尾、前、后以及背形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段背径最长，可为背侧和侧，两细胞界清晰。

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，分别控制头尾、前、后以及背形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段背径最长，可分为背侧和侧，两分细胞分界清晰。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎的发育是由四种系统，分别控制头尾部、前部、后部腹部的形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段的腹径最长，可分为侧部和腹侧部，两部分的细胞分界清晰。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎的发育是由四种系统，别控制头尾部、前部、后部以及背腹部的形成。

In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.

后段的背腹径最，为背侧部和腹侧部，两部的细胞界清晰。