…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 |
…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 |
A city in northern Saitama Prefecture. It was inco...
Born: September 28, 1892, New York [Died] May 8, 1...
The term refers to the spread of learned law (Roma...
A shrub of the Epacris family similar to the Erica...
...General term for insects belonging to the orde...
…The term “Ironsides” is a colloquial name for th...
The title of a Nagauta piece. It was first perform...
The owner of the net, and usually also the manage...
A village in Minamisaku District, eastern Nagano P...
A prefecture-level city in the eastern part of th...
...A town in Izumi County, northwest of Kagoshima...
...In the cities, men wore black monfuku with hak...
...A job title in the Kamakura Shogunate. Also ca...
...Originating from Sakhalin, it is a sled dog. I...
This was a Fudai domain that ruled the area aroun...