Expressivity


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Expressivity

 

the phenotypic manifestation of genes. Some genes in animals, plants, and microorganisms are characterized by comparatively constant expressivity; that is, they are manifested more or less equally in all the individuals of the corresponding genotype. For example, all wheat plants homozygous for the gene responsible for the absence of awns develop awnless spikes. Other genes—apparently the majority—are distinguished by changing expressivity. Rabbits and some other animals are known to have a Himalayan-pigmentation gene, which is responsible for black feet, ear, nose, and tail tips against a white or some other light background. However, such coloring appears only when young animals of the Himalayan breed are raised in environments having moderate temperatures. The for of individuals of the same Himalayan genotype becomes entirely white in high temperatures and black in low. This example shows that expressivity is influenced by environmental factors—in this case, the temperature.

Under identical environmental conditions, the expressivity of a gene may depend on the genotypic environment, that is, on the other genes with which the given gene combines to form the genotype. The possibility that stabilizing artificial selection can sometimes affect the extent to which hereditary traits are manifested in the phenotype suggests that modifier genes are involved in the variation of expressivity. Expressivity and penetrance, the principal interrelated indicators of phenotypic variability of gene manifestation, are widely used in phenogenetics, medical genetics, and breeding of animals, plants, and microorganisms.

REFERENCES

Lobashev, M. E. Genetika. Leningrad, 1967.
Timofeev-Resovskii, N. V., and V. I. Ivanov. “Nekotorye voprosy fenogenetiki.” In the collection Aktual’nye voprosy sovremennoi genetiki. Moscow, 1966.

V. I. IVANOV

References in periodicals archive ?
Three from the eight selected papers had as theme verbal and non-verbal communication in television journals, two were about actor expressivity, other two about expressivity of college teacher and one about Law School students' expressiveness.
First, the theory implies that levels of instrumentality and expressivity will influence mutuality in a friendship, given that, as previously discussed, the reciprocal nature of mutuality involves an orientation toward both the self (i.
Because the analyses are so engaged with expressivity, performers too, will likely find many of them enlightening and perhaps critical in helping to hone their interpretations.
Table 4: Comparison between male and female on Adult Attachment Scale (AAS) and Emotional Expressivity Scale (EES) among Depressed Individuals and Non depressed (N = 150)
Ohman is not suitable, so we propose to apply linear interpolation between expressivity coefficients of these phonemes.
Other causes are related to the diagnostic criteria currently used, including the high number of diagnostic parameters, the low level of sensitivity and specificity of most of them, and their highly variable expressivity.
Emotional expressivity, emotion regulation, and mood, which are three important domains of an individual's emotion system and the core aspects of personality, may affect an individual's social adaptation and mental health.
Whereas for people who either had difficulty expressing emotion or putting a label on their emotion, knowledge is still beneficial" Depressive symptoms--which can include loneliness, sadness, fear, sleep difficulties, and an unshakable sense of the "blues"--as well as anxiety symptoms were associated with repression of anger, difficulty describing feelings, and low emotional expressivity.
90[yen]--The forms of linguistic articulation and expressivity in contextualized (and situated) cognition and knowledge production have been the focus of a lot interesting work in philosophical anthropology as well as in cognitive science (including cognitive anthropology) over the past forty years or so.
Yes, Cunningham elided modern forms with ballet but Swinston's class, accompanied by a single drummer, suggested wide-ranging influences for the technique and clarified its rhythmic expressivity, its rigorous layering of bodily tasks, and its plain, physical logic.
Emotional expressivity refers to the skills of individuals to express their non-verbal communication skills, especially skills of sending emotional messages, in expressing the direction of non-verbal expression in interpersonal communication and emotional conditions fully, emotional sensivity in receiving, understanding and interpreting others ' non-verbal messages; emotional control in arranging and controlling their emotional and non-verbal reactions.
The appendixes are numerous and wide-ranging, such as an overview of the International Phonetic Alphabet (IPA) for English, expression and verb lists for use in expressivity exercises, a summary of Wanat's recommended approach to learning a song, and questions for developing a character and scene.