Metabolism activity of the zygote at prophase of mitosis turns high again for a prominent nucleolus, increased nuclear pore, active synthesis and a new set of ribosomes appeared in the cytoplasm.

• 合子分裂前期，核仁显著，核孔增多，细胞核的合成活动增强，细胞质中出现新一代核糖体，代谢再度增强；