phenotype: Quick Facts

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Photos

Diagram illustrating three types of natural selection-stabilizing, directional, and diversifying-showing how each affects the distribution of beetle phenotypes in a population over multiple generations. Shaded areas indicate phenotypes selected against, and arrows show shifts in population traits.

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Topics

phenotypic plasticity secretor system assortative mating negative assortative mating positive assortative mating Bergmann’s Rule heredity gene character genotype genetics Lamarckism DNA RNA Testcross chimera chromosome

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heredity: Introduction

Key People

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Wilhelm Ludvig Johannsen

Danish botanist and geneticist