FNR 24000 Lecture Notes - Lecture 31: Arabidopsis Thaliana, Phenotypic Plasticity, F-Number
3 Dec 2018
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Document Summary
The composite of an organism"s observable characteristics or traits, such as its morphology, development, biochemical or physical properties, phenology and behavior. In a population, there can be substantial phenotypic variation. Genetic variation (different alleles) plays a major role in generating phenotypic variation. However, the phenotype produced by a particular genotype can also be influences by other factors. Organisms with identical genotypes can produce different phenotypes when placed into different environments. When a single genotype can produce multiple phenotype under different environmental conditions. Gene expression depends on the type of food (e. coli) Stem elongation is sensitive to wind (arabidopsis thaliana) An organism is likely to experience different environments over its life-environmental heterogeneity. The optimal phenotype differs in each environment-phenotypic trade-off. Individuals that express plasticity have greater fitness than individuals that express a single phenotype in all environments. Plasticity is common across many animals especially in invertebrates. Can be response to temperature, diet, moisture, competition, etc.
