Video Experimental Relacionado
Updated: Jun 17, 2026
06:11
A Conflict Model of Reward-seeking Behavior in Male Rats
Published on: February 20, 2019
¿Evidencia de escape de un conflicto adaptativo?
1Department of Biological Sciences, Western Michigan University, Kalamazoo, Michigan 49008, USA.
Nature
|December 17, 2009
Resumen
La duplicación de genes crea nuevos genes, pero no está claro cómo evolucionan. El escape del modelo de conflicto adaptativo.
Área de la Ciencia:
- Evolución molecular de la evolución molecular.
- La genómica es la genómica.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La duplicación de genes es un motor clave de la innovación evolutiva, generando nuevos genes.
- El modelo de escape del conflicto adaptativo (EAC, por sus siglas en inglés) propone que la duplicación de genes resuelve las restricciones funcionales en los genes ancestrales.
- Los genes de la dihidroflavonol-4-reductasa (DFR) en las plantas son un sistema modelo para estudiar la divergencia funcional después de la duplicación.
Videos de Conceptos Relacionados
01:15Natural Selection and Adaptation
Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations, psychological...
Beyond physical adaptations, psychological...
04:49Robbers Cave
During the 1950s, the landmark Robbers Cave experiment demonstrated that when groups must compete with one another, intergroup conflict, hostility, and even violence may result. At the Oklahoman summer camp, two troops of boys—termed the Rattlers and the Eagles—took part in a week-long tournament. During this time, their negativity culminated in derogatory name-calling, fistfights, and even vandalism and destruction of property. However, this work also revealed that such tension could be...
01:20Evolutionary Psychology
Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
02:55The Evidence for Evolution
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.
01:14Avoidance Learning and Learned Helplessness
Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
01:14Frustration and Conflict: Avoidance-Avoidance, Double-Approach Avoidance
Avoidance-avoidance conflict refers to a psychological situation where a person must choose between two or more unpleasant alternatives. These conflicts are particularly stressful because neither option is desirable. This dilemma is often expressed in sayings like "caught between a rock and a hard place" or "between the devil and the deep blue sea." For instance, individuals who fear dental procedures may find themselves torn between enduring a painful toothache or facing the anxiety of...