Video Experimental Relacionado
Updated: Jan 29, 2026

06:36
Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
Published on: February 27, 2021
4.2K
Una visión ampliada de los rasgos complejos: de los poligénicos a los omnígenos
Evan A Boyle1, Yang I Li1, Jonathan K Pritchard2
1Department of Genetics, Stanford University, Stanford, CA 94305, USA.
Cell
|June 17, 2017
Resumen
La variación genética y los vínculos de la enfermedad son complejos. El modelo "omnígeno" propuesto sugiere que la mayor parte de la heredabilidad de los rasgos complejos proviene de efectos genéticos generalizados, no solo de las vías principales de la enfermedad.
Área de la Ciencia:
- La genética
- Biología de sistemas
- La genómica
Sus antecedentes:
- Comprender la base genética de enfermedades complejas es un objetivo central en genética.
- Tradicionalmente, se esperaba que las variantes de la enfermedad se agruparan en las vías etiológicas clave.
- Sin embargo, las señales de asociación para rasgos complejos a menudo se distribuyen ampliamente en todo el genoma.
Objetivo del estudio:
- Proponer y definir un modelo alternativo para la arquitectura genética de rasgos complejos.
- Explicar por qué las señales de asociación están muy extendidas e incluyen genes que no están obviamente relacionados con la enfermedad.
Principales métodos:
- El estudio propone un marco teórico, el modelo "omnígeno".
- Este modelo postula que las redes reguladoras de genes están altamente interconectadas.
Principales resultados:
- El modelo omnígeno sugiere que todos los genes expresados en las células relevantes para la enfermedad pueden influir en los genes de la enfermedad central.
- Postula que la mayor parte de la heredabilidad de los rasgos complejos surge de los efectos en los genes fuera de las vías centrales tradicionalmente definidas.
Conclusiones:
- El modelo "omnígeno" proporciona un marco unificador para comprender la base genética de los rasgos complejos.
- Esta perspectiva desafía la visión tradicional y destaca la influencia generalizada de la variación genética en todo el genoma.
Videos de Conceptos Relacionados
X-linked Traits
58.6K
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
58.6K
Trait Centrality
191
Trait centrality refers to the degree to which a particular characteristic influences the overall impression of an individual. Some traits exert a disproportionately strong impact on perception, shaping how people interpret other attributes of a person. Solomon Asch first systematically studied this phenomenon in 1946.Asch’s Experiment on Trait CentralityAsch's seminal study demonstrated the centrality of certain traits through a controlled experiment. Participants were presented with a...
191
Polygenic Traits
69.0K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
69.0K
Trait and State Self-Esteem
11.5K
The term self-esteem is often used generically, to refer to how people feel about themselves. However, according to research, there are three distinct constructs that should not be used interchangeably (Brown & Marshall, 2006).
11.5K
Multiple Allele Traits
38.1K
The Concept of Multiple Allelism
38.1K
Traits and States
550
Personality traits represent consistent patterns in behavior, thoughts, and emotions, reflecting an individual's tendencies across various situations. For example, extraversion, a well-known trait, manifests in individuals as talkative, energetic, and enthusiastic behaviors. These traits are stable over time, offering a reliable framework for predicting how people might act in different contexts. However, they do not define every moment of an individual's life. In contrast to traits,...
550

