| 单词 | balanced polymorphism |
| 释义 | > as lemmasbalanced polymorphism balanced polymorphism n. Genetics genetic polymorphism that persists at a stable level within a population, being maintained by a selective advantage favouring heterozygotic organisms; an instance of this. ΚΠ 1934 E. B. Ford Mendelism & Evol. (ed. 2) v. 94 It is perhaps possible that such divergence originated as a balanced polymorphism. 1964 Listener 11 June 952/1 Balanced polymorphism is something different... The existence of both sexes maintained indefinitely in roughly equal proportions is one example; the familiar ABO blood group genes provide another excellent example. 2005 C. Tudge Secret Life Trees xii. 312 Thus jack pines have a ‘mixed strategy’: the genes that make their cones so special are clearly of two kinds—some that gear the cone to fire, and some that enable it to respond to sunshine. Geneticists call this a ‘balanced polymorphism’. < as lemmas |
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