Canalization is
the tendency for development of a specific genotype to follow the same trajectory under different conditions (different environments or different genetic backgrounds)
, while developmental stability is the tendency for the development of a specific genotype to follow the same trajectory under the same …
What is the concept of canalization and Decanalization?
Consequently, canalization is now seen as a population-level phenomenon, and decanalization is said to occur
when the variability of a trait at the population level increases after some perturbation
. … In this scenario, the mean value for a quantitative trait may remain unchanged, while the variance increases.
What is an example of canalization?
An example of a highly canalized behavior is
motor development
(we will all walk sooner or later) and an example of a not- canalized behavior is intelligence (we will all be smart but not everyone is going to be Einstein and we can’t really predict who will be smart and who won’t.
What is Canalizing selection?
Their main conjecture was the existence of a special kind of stabilizing selection, so-called canalizing selection, which
favors genotypes that deviate least from the trait optimum
(e.g., the fitness optimum), by selecting for genetic mechanisms that suppress phenotypic variation caused by mutations (genetic …
What is economic canalization?
Decanalisation was a trade liberalisation policy adopted in the early 1990s. Till then, most of the imports were made by public sector enterprises on behalf of all importers (this is called canalisation). … Decanalisation means
the end of public sector channelized imports and importers can import goods on their own
.
What does canalization mean?
transitive verb. 1a :
to provide with a canal or channel
. b : to make into or similar to a canal. 2 : to provide with an outlet especially : to direct into preferred channels.
What is meant by canalisation?
Canalisation is a
measure of the ability of a population to produce the same phenotype regardless of variability of its environment or genotype
. … Biological robustness or canalisation comes about when developmental pathways are shaped by evolution.
Why is canalization important?
Canalization
reflects the capacity of an organism’s developmental process to maintain a constant phenotype in spite of perturbations
. This concept was first introduced by Waddington [1], who noticed the striking robustness properties of the development in complex organisms.
Is PP genotype or phenotype?
A simple example to illustrate genotype as distinct from phenotype is the flower colour in pea plants (see Gregor Mendel). There are three available genotypes, PP (
homozygous dominant
), Pp (heterozygous), and pp (homozygous recessive).
What is a strongly canalized trait?
STRONGLY canalized trait =
highly influenced by genes
. Reaction Range. Genotype provides a particular range and pattern within which a phenotype is expressed depending on the environment.
What characteristics are canalized?
Canalized traits are
phenotypically expressed only in particular environments or genetic backgrounds and become available for natural
selection, a mechanism that can lead to the assimilation of novel traits.
What is range of reaction?
In genetics, reaction range (also known as range of reaction) is
when the phenotype (expressed characteristics) of an organism depends both on the organism’s genetic characteristics (genotype) and the environment
. For instance, two siblings raised together can have radically different IQs and natural talents.
What is growth canalization?
According to the concept of canalisation,
infants and children stay within one or two growth channels
, and therefore, any crossing of height centiles always warrants further evaluation. … During childhood, growth in boys appeared slightly more canalised than in girls (P = 0.02).
What is import canalization?
2. INTRODUCTION • Means the establishment of trade monopoly in Foreign Trade • “Canalisation” of import or export
means Import or Export only through the agencies designated by the Central Government
. • Emphhasizes on Foreign Trade flow rather than ownership of agency conducting it.
Which is an example of canalised agency?
The 13 STEs include
NAFED
, Spices Trading Corporation, AP State Trading Corporation, and Maharashtra State Agricultural Marketing Board, Minister of State for Commerce and Industry D. Purandeswari said in a reply in Lok Sabha.
What is a canalizing agency?
Canalizing agency is the term
used by a number of developing countries to describe the STEs they maintain
. The term refers to the channelling, or “canalizing”, of imports and/or exports through a designated product-specific enterprise.
