Loading AI tools
Found in articles
对人类胚胎而言，大约第四周时，性腺的雏形出现于中间中胚层（英语：Intermediate mesoderm），与发育中的肾脏毗邻；大约第六周时，上皮性索（英语：Sex cords）在形成中的睾丸内发育，并在生殖细胞迁入性腺时与之合并。男性的某些Y染色体基因（尤其是SRY）控制男性表型的发育，包括将早期双能性腺转化为睾
ISSN 0261-3077. （原始内容存档于2023-04-30） （英国英语）. Jensen, Björn-Erik Ole; Knops, Elena; Cords, Leon; Lübke, Nadine; Salgado, Maria; Busman-Sahay, Kathleen; Estes, Jacob
show, a need to broaden his horizons, and the desire to preserve his vocal cords for singing opera as reasons for leaving the show. Sergeant Cerreta was