Norms of reaction for two genotypes. Genotype B shows a strongly bimodal distribution indicating differentiation into distinct phenotypes. Each phenotype is buffered against environmental variation - it is canalised.
In genetics, canalisation is a measure of the ability of a genotype to produce the same phenotype regardless of variability of its environment. The term canalisation was coined by C. H. Waddington, who also helped explain its developmental mechanisms. He also introduced the epigenetic landscape, in which a canalised trait is illustrated as a valley enclosed by high ridges, safely guiding the phenotype to its "fate". In ecology and biology, a norm of reaction describes the pattern of phenotypic expression of a single genotype across a range of environments. ... Genetics (from the Greek genno Î³ÎµÎ½Î½Ï= give birth) is the science of genes, heredity, and the variation of organisms. ... The genotype is the specific genetic makeup (the specific genome) of an individual, usually in the form of DNA. It codes for the phenotype of that individual. ... The phenotype of an individual organism is either its total physical appearance and constitution or a specific manifestation of a trait, such as size or eye color, that varies between individuals. ... Conrad Hal Waddington (1905 â 1975), known to his friends as Wad, was a developmental biologist, paleontologist, geneticist, embryologist and philosopher. ...
Category: Genetics stubs Developmental biology is the study of the process by which organisms grow and develop. ... Morphogenesis (from the Greek morphÃª shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. ... The phenotype of an individual organism is either its total physical appearance and constitution or a specific manifestation of a trait, such as size or eye color, that varies between individuals. ... The genotype-phenotype distinction refers to the fact that while genotype and phenotype of an organism are related, they do not necessarily coincide. ... In ecology and biology, a norm of reaction describes the pattern of phenotypic expression of a single genotype across a range of environments. ... In biology and psychology Gene-environment interaction is a term used to describe any phenotypic effects that are due to interactions between the environment and genes. ... Heritability, as used professionally in genetics, has a very precise definition. ... Genetic architecture refers to the underlying genetic basis of a phenotypic trait. ... It has been suggested that dominant gene be merged into this article or section. ... An example of epistastis would be sweet peas. ... Polygenic inheritance is the inheritance pattern of a trait controlled by two or more genes. ... Pleiotropy is the multiple effects of a single gene. ... We dont have an article called Phenotypic plasticity Start this article Search for Phenotypic plasticity in. ... In evolutionary biology, fitness landscapes or adaptive landscapes are used to visualize the relationship between genotypes (or phenotypes) and replicatory success. ... It has been suggested that this article or section be merged with Epigenetics. ... It has been suggested that this article or section be merged with Epigenetic inheritance. ... A maternal effect, in genetics, is the phenomena where the genotype of a mother is expressed in the phenotype of its offspring. ... It has been suggested that Racial memory be merged into this article or section. ... A speculatively rooted phylogenetic tree of all living things, based on rRNA gene data, showing the separation of the three domains, bacteria, archaea, and eukaryotes, as described initially by Carl Woese. ... Evolvability is a concept in that relates ability of a particular phenotype to be robust to mutations. ... The evolution of sex is a major puzzle in modern evolutionary biology. ... Conrad Hal Waddington (1905 â 1975), known to his friends as Wad, was a developmental biologist, paleontologist, geneticist, embryologist and philosopher. ... Richard Lewontin Richard Charles Dick Lewontin (born March 29, 1929) is an American evolutionary biologist, geneticist and social commentator. ... Nature versus nurture is a shorthand expression for debates about the relative importance of an individuals innate qualities (nature) versus personal experiences (nurture) in determining or causing individual differences in physical and behavioral traits. ... This is a list of topics in evolutionary biology and evolution. ...
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