hat
Testostewòn se obsève nan pifò vertebrates. Testostewòn ak reseptè klasik nikleyè a premye parèt nan gnatostomes (vertebrates machwè). Agnathans (vertebrates glas) tankou lampreys pa pwodui testostewòn men olye itilize androstenedyon kòm yon òmòn sèks gason. Pwason fè yon fòm yon ti kras diferan ki rele 11-ketotestosterone.Its kontrepati nan ensèk se ecdysone.Partans sa a nan estewoyid omniprésente nan yon pakèt bèt sijere ke òmòn fè sèks gen yon ansyen istwa evolisyonè.
eng
Testosterone is observed in most vertebrates. Testosterone and the classical nuclear androgen receptor first appeared in gnathostomes (jawed vertebrates). Agnathans (jawless vertebrates) such as lampreys don't produce testosterone but instead use androstenedione as a male sex hormone. Fish make a slightly different form called 11-ketotestosterone.Its counterpart in insects is ecdysone.The presence of these ubiquitous steroids in a wide range of animals suggest that sex hormones have an ancient evolutionary history.