Definitionn. (genetics) the genetic variation within a population that natural selection can operate on
Last update: September 26, 2015
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If our knowledge of the life-histories of these organisms were perfect, their polymorphism would present no difficulties to classification; but unfortunately this is far from being the case. [Please select]
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Here, then, is a colony in which the division of labour has reached a remarkable degree of polymorphism. [Please select]
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This polymorphism among the Tubularians is another evidence of the relation between the Siphonophoræ, or floating Hydroids, and the fixed Hydroids. [Please select]
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Even more recently he has made known to us the still more remarkable phenomenon afforded by the genus _Lythrum_, in which there are three distinct forms, and which therefore offers an instance of polymorphism. [Please select]
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The other kind of dimorphism or polymorphism differs from the first in being the result of the differentiating action of external circumstances, not on the mature, but on the young individual. [Please select]
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