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In-vitro Mutagenesis01:16

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
CRISPR01:59

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
Combinatorial Gene Control02:33

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
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Genetic Screens02:46

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
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CRISPR/Cas9 Genome Editing01:28

CRISPR/Cas9 Genome Editing

The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...

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Video Experimental Relacionado

Updated: Jul 13, 2026

Preventing the Spread of Malaria and Dengue Fever Using Genetically Modified Mosquitoes
17:50

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Published on: July 4, 2007

El control de la población de insectos mediante un sistema genético dominante, reprimible y letal.

D D Thomas1, C A Donnelly, R J Wood

  • 1Department of Zoology, Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.

Science (New York, N.Y.)
|March 31, 2000
PubMed
Resumen

Los investigadores desarrollaron una nueva técnica de insectos estériles utilizando insectos transgénicos con un sistema genético letal específico de la hembra. Esta modificación ofrece un enfoque genético prometedor para el control de plagas en varios organismos.

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Área de la Ciencia:

  • Genética La genética.
  • Biología Molecular Biología Molecular
  • Entomología Entomología.

Sus antecedentes:

  • La técnica de insectos estériles (SIT) es un método para el control de plagas de insectos.
  • Las modificaciones a la SIT tienen como objetivo mejorar su eficiencia y aplicabilidad.

Objetivo del estudio:

  • Para describir una modificación importante de la técnica del insecto estéril.
  • Introducir insectos transgénicos con un sistema genético letal dominante, reprimible y específico de la hembra.

Principales métodos:

  • Se desarrollaron dos métodos genéticos para lograr el sistema genético letal deseado en un fondo genético de tipo salvaje.
  • Método 1: Promotor / potenciador específico del sexo que impulsa un factor de transcripción reprimible que controla un gen tóxico.
  • Método 2: Expresión no específica por sexo del factor de transcripción que regula un producto genético selectivamente letal.

Principales resultados:

  • Ambos métodos desarrollados funcionan de manera eficiente en Drosophila melanogaster.
  • Los sistemas genéticos proporcionan las características requeridas para el SIT modificado.

Conclusiones:

  • Se espera que los principios genéticos descritos sean ampliamente aplicables a los organismos de insectos económicamente importantes.
  • Este SIT modificado ofrece una nueva herramienta genética para el control de plagas de insectos.