نتایج جستجو برای: genetic and environmental variations
تعداد نتایج: 16951665 فیلتر نتایج به سال:
this study attempts to investigate the effect of peers’ revision in comparison to that of the teacher, and whether peers’ comments and teachers’ comments facilitate students’ revision? if yes, which one is more effective? also attempts have been made to see which aspects of language are more highlighted by peers versus teachers when commenting. besides, it is investigating the student’s attitud...
The objectives of present study were to estimate the genetic and permanent environmental covariance components and genetic and phenotypic trends of test-day records of somatic cell score (SCS) of the first lactation Iranian Holstein cows. Dataset included the 108995 test day records were collected by the Animal Breeding Center of Iran from 2001 to 2010. The GLM procedure of SAS software was use...
Background and purpose: Asthma is a chronic inflammatory disease of the airways that is caused by hypersensitivity to environmental allergens. Symptoms of asthma include shortness of breath, airway hyper-responsiveness, wheezing, and cough. The disease might vary from a mild to severe and intermittent to chronic disease. Asthma is known as a multifactorial disease due to the interaction of gene...
Rare, high-penetrance genetic variations account for a small portion of genetic cancer syndromes. In contrast, most cancers develop from a combination of minor genetic influences and environmental factors. There are numerous publications on cancer susceptibility. In contrast, genetic studies in treatment response and outcome analyses are a rapidly emerging field. Approaches used in disease susc...
chamomile serves as one of the most important medicinal plants. the most known secondary metabolites in chamomile species are volatile oils of triponoides, poly stilens, flavonoids and phenolic cafeic acid (krori). these metabolites have wide variety of applications thanks to having medicinal properties of anti-inflammation, antispasmodic and bactericide activity. also it is used to cure liver ...
Estimation of genetic trends is necessary to monitor and evaluate selection programs. The objective of this study was to estimate the genetic trends for milk yield in Iranian Holsteins cows using random regression test day model. Data set was consisted of 743205 test-day records from 1991 to 2008, which were collected by the Animal Breeding Centre of Iran. Breeding, environmental and phenotypic...
Sarcoidosis is an immune-mediated, multiorgan, granulomatous disorder thought to be triggered by an intricate combination of environmental and genetic factors. Two robust lines of evidence support the hypothesis of a genetic component in the pathogenesis of sarcoidosis: racial variation in its epidemiology and familial clustering of cases. The relationship between epidemiology and environmental...
The aim of this study was to model the variances and covariances of body weight in Zandi sheep from 60 to 365 days of age using random regression models (RRM). Legendre polynomials of different orders were used to model the direct and maternal covariances. Mean trends were also modeled through a quadratic regression on orthogonal polynomials of age. Homogeneity and heterogeneity of the residual...
The genetic constitution of an individual largely governs its morphological development and its response to both internal and external stimuli. The inherited character may be expressed regardless of the nongenetic or environmental influences; or the nongenetic influences may completely suppress the genetic tendencies. Neither, in a large majority of the cases, is completely suppressed by the ot...
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