【摘要】 雌雄异体生物，是由雌雄同体生物通过交换性染色体，或性染色体的性基因产生异化，随交换或异化的时间不同，性染色体的性基因数量不同，环境条件不同，采用不同的方式，经过五个途径，演变为x2、x2A、x2y、y2A、y2x1型生物．由雌雄同体生物进化为雌雄异体生物，是生物进化史上的第四次大飞跃，推动生物向更高阶段进化，带来生物界的更大繁荣．更多还原

【Abstract】 Dioecism creature changes into five kind, of creature which are x2, x2A, x2y, y2A, y2x through five avenues. Hermaphroditism changes sex - chromosome each other, or sex - chromosom’s sex - gene produce catabolize, there are many difference during this process. They’re time, the sex - gene number in sex-chromosome. environment condition, method. Tt’s the forth overfly during the history of anagenesis. that hermaphroditism creature changes into dioecism creature. It drive anagenesis to a higher peried and bring a bigger florish of biosphere.更多还原