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相关概念视频

Genetic Screens02:46

Genetic Screens

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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
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
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Gene-Environment Interactions01:20

Gene-Environment Interactions

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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Epistasis Analysis01:09

Epistasis Analysis

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Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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Mouse Models of Cancer Study02:43

Mouse Models of Cancer Study

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Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
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Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Genomic Imprinting and Inheritance

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
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相关实验视频

Updated: Feb 26, 2026

Microinjection of Medaka Embryos for use as a Model Genetic Organism
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梅达卡:一种分析基因组与环境相互作用的新型模型.

Kiyoshi Naruse1, Felix Loosli2, Satoshi Ansai3

  • 1Laboratory of Bioresources, National Institute for Basic Biology, Okazaki 444-8585, Japan.

Trends in genetics : TIG
|February 24, 2026
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概括

梅达卡鱼是研究的多功能脊椎动物模型,非常适合研究基因和环境如何相互作用. 它们的适应能力和遗传资源支持进化和生物医学的先进研究.

关键词:
在GWAS中,GWAS就是GWAS.在 QTL 映射中使用 QTL 映射.基因组 环境 相互作用梅达卡 (MEDAKA) 是一家医疗机构.人口遗传学资源资源野生衍生菌株野生衍生菌株

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科学领域:

  • * 脊椎动物模型系统
  • * 基因组学和表观遗传学
  • * 进化生物学 进化生物学

背景情况:

  • * 梅达卡 (鱼) 是生物和生物医学研究的一个成熟的模型.
  • * 具有独特的生态适应性 (4-40°C,不同盐度) 和实验性处理性.
  • *对内生繁殖的高耐受性允许创建基因统一的研究小组.

研究的目的:

  • * 突出梅达卡适用于研究基因组与环境相互作用的适用性.
  • * 展示多样化的梅达卡菌株和先进的遗传工具的实用性.
  • *将medaka定位为整合遗传,环境和表观遗传研究的框架.

主要方法:

  • *使用梅达卡同系基约苏-卡尔斯鲁厄面板 (80条近同源线).
  • *分析了100多种野生来源的,完全测序的梅达卡菌株.
  • * 应用先进的量化方法进行全基因组关联研究 (GWAS) 和定量特征位置 (QTL) 映射.
  • *采用聚类正规间隔的短平行体重复 (CRISPR) /Cas9基因编辑和表观基因组分析.

主要成果:

  • * 梅达卡在株内变化很低,但在株间变化很高 (SNP比率>4%).
  • * 该系统支持高级遗传分析,如GWAS和QTL映射.
  • *CRISPR/Cas9编辑和表观基因组分析有助于因果验证和调控机制的发现.

结论:

  • * 梅达卡提供了一个无与伦比的脊椎动物框架,用于整合遗传学,环境和表观遗传学.
  • * 这个模型系统将进化,生物医学和人口层面的研究视角相结合.
  • * 它的独特特征使复杂的生物相互作用的全面研究成为可能.