性-人类性的基本层面
Sex - Basic Aspects of Human Sexuality

染色体的功能：性的分化首先是如何发展的？

如果这个新的受精细胞（受精卵）含有两条X染色体，胚胎将最终发育出卵巢。然而，如果受精卵中存在Y染色体，它会调控未分化的生殖细胞团发育成睾丸。进而，睾丸产生睾丸激素，进一步促进胚胎发育成男性。

The Role of Chromosomes:How do the different sexes first develop?

If the new fertilized cell contains two X-chromosomes, the embryo will eventually form ovaries. However, if a Y-chromosome is present, it stimulates the undifferentiated gonadal cell mass to develop into testicles. The testicles, in turn, produce the hormone testosterone which further advances the process of the embryo turning into a male.