研究证实,胚胎的早期发育不是由其细胞核控制,而是由储存在卵质中或由卵源基因表达的一些因子所控制,这些基因即被称作母性效应基因(maternal effect gene)。母性效应基因的基本特性有:①在原始生殖细胞和/或卵母细胞中特异表达;②其基因转录产物或编码蛋白质是在卵子发生过程中,由卵巢组 Studies confirm that the embryo’s early development is not controlled by its nucleus, but is controlled by factors stored in the egg or expressed by the egg’s gene, called the maternal effect gene. The basic characteristics of maternal effect genes are: ① specific expression in primordial germ cells and / or oocytes; ② its gene transcription product or encoding protein in the process of egg development, from the ovarian group