Since the early human embryo looks like that of fish, salamander and chicken, humans must have evolved from these animals. 因为人的早期胚胎形象和鱼的，蝾螈的，鸡的形象相同，所以人必然是由这些动物演化而来的。
So the DNA methylation patterns of mouse tetraploid embryos are aberrant, which may lead to subsequent developmental failures and embryo death. 这是对小鼠四倍体早期胚胎基因组甲基化模式的首次报道。
