Transient polymorphism

Japanese: transient polymorphism(英語表記)transientpolymorphism
Transient polymorphism

...When observing the decline, the population is polymorphic. This is called transient polymorphism. An example is the coexistence of increasing black genes and decreasing white genes in industrial melanism of moths, but it is thought that polymorphism will disappear after a sufficient amount of time. Such transient polymorphism can also occur when the frequency of a gene that is nearly neutral to natural selection happens to exceed 1% by chance due to chance drift. ...

*Some of the terminology that refers to "transient polymorphism" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…その減少途中を観察すると集団は多型的である。これを推移的多型transient polymorphismといい,ガの類の工業暗化の場合に,増加しつつある黒色遺伝子と減少しつつある白色遺伝子が共存しているのがその例であるが,十分時間がたてば多型的でなくなると考えられる。このような一時的な多型は自然淘汰に対してほぼ中立である遺伝子の頻度が,機会的浮動により偶然1%を超える場合にも生じる。…

※「transient polymorphism」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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