testis determinant

例句：

1. 1. The testis determinant plays a crucial role in male fertility.
   睾丸决定因素在男性生育中起着至关重要的作用。
2. 2. The testis determinant has been shown to be involved in the development of spermatids.
   研究表明，睾丸决定因素与精原细胞的发展有关。
3. 3. The testis determinant is believed to be responsible for the production of hormones that regulate sexual development.
   人们认为睾丸决定因素负责产生激素，这些激素调节性发育。