翻訳と辞書 Words near each other ・ Wallace Dollase ・ Wallace Douglas ・ Wallace Downey ・ Wallace Duffield Wright ・ Wallace E. Boston, Jr. ・ Wallace E. Brown ・ Wallace E. Conkling ・ Wallace E. Cunningham ・ Wallace E. J. Collins III, Esq. ・ Wallace E. Kirkpatrick ・ Wallace E. Nield ・ Wallace E. Oates ・ Wallace E. Pierce ・ Wallace Eddinger ・ Wallace Edwards ・ Wallace effect ・ Wallace Emerson ・ Wallace Estill, Sr., House ・ Wallace F. Bennett ・ Wallace F. Johnson ・ Wallace F. Randolph ・ Wallace Falls State Park ・ Wallace Fard Muhammad ・ Wallace Farm ・ Wallace Farm (Columbia, New Hampshire) ・ Wallace Fennel ・ Wallace Fernando Pereira ・ Wallace Fessenden ・ Wallace Ford ・ Wallace Fortuna dos Santos Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Wallace effect ： ウィキペディア英語版 Wallace effect The Wallace effect is a hypothesis developed by British naturalist Alfred Russel Wallace which posits that natural selection can contribute to the reproductive isolation of incipient species by evolving barriers against hybridization. ==Historical development== In Wallace's 1889 book ''Darwinism'', he explained and defended the theory of natural selection, first widely presented in 1859 by Charles Darwin in ''On the origin of species''. In it he proposed that natural selection could cause the reproductive isolation of two varieties by encouraging the development of barriers against hybridization, and thus contribute to the development of new species. He suggested the following scenario: When two varieties of a species had diverged beyond a certain point, each adapted to different conditions, hybrid offspring would be less well adapted than either parent form. At that point natural selection will tend to eliminate the hybrids. Under such conditions natural selection would also favor the development of barriers to hybridization, since individuals that avoided hybrid matings would tend to have more fit offspring. This would contribute to the reproductive isolation of the two incipient species. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wallace effect」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.