Bidder's organ

Japanese: Bidder's organ(英語表記)Biddersorgan
Bidder's organ

…This phenomenon is called juvenile hermaphroditism. In toads, when the testes are removed, the Bidder's organ, a vestigial ovary, develops into a functional ovary, so this phenomenon is called vestigial hermaphroditism. The mechanism of this hermaphroditism is unknown, but it is gradually being elucidated by inducing abnormalities through short-day treatment, high-temperature treatment, and hormone treatment, and by using mutants. …

*Some of the terminology that mentions "Bidder's organ" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…これは,幼時雌雄同体現象と呼ばれる。ヒキガエル類では精巣を除去すると,卵巣の痕跡器官であるビダー器官Bidder’s organが機能的な卵巣に発達するので,痕跡的雌雄同体現象という。以上の雌雄同体現象の機構は不明だが,短日処理や高温処理,ホルモン処理によって異常を誘導したり,突然変異体を使うことによって,しだいに解明されつつある。…

※「Bidder's organ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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