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Lethal Alleles02:41

Lethal Alleles

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Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
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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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相关实验视频

Updated: Jan 4, 2026

Recessive Lethal Alleles Cause Genetic Disorders in Humans
02:41

Recessive Lethal Alleles Cause Genetic Disorders in Humans

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通过密度反转和下层地挤压形成变态核心复合体.

F Martinez1, A M Goodliffe, B Taylor

  • 1Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu 96822, USA. martinez@soest.hawaii.edu

Nature
|June 22, 2001
PubMed
概括
此摘要是机器生成的。

变态核心复合体通过垂直挤出柔性下层地材料而形成. 这一由地密度逆转驱动的过程在巴布亚新几内亚被观察到.

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Mouse Models of Cancer and Pre-clinical Testing of Cancer Drugs
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科学领域:

  • 地质地质地质地质地质地
  • 构造学 构造学 构造学 构造学
  • 地质物理学 地质物理学

背景情况:

  • 变态核心复合体是地质特征,其特点是深层地岩的圆顶升起.
  • 它们的形成机制受到争议,模型包括低角度正常断层和浮动入侵.
  • 巴布亚新几内亚的D'Entrecasteaux岛屿在裂环境中提供了一个独特的活跃示例.

研究的目的:

  • 研究D'Entrecasteaux群岛活跃的变态核心复合物的形成机制.
  • 为了测试由地密度逆转驱动的垂直挤出假设.
  • 评估该机制对其他地质环境的一般适用性.

主要方法:

  • 同静态建模以了解密度变化和浮力力.
  • 分析地质数据,包括岩石类型和结构特征.
  • 测量热流量以推断热状态和地过程.

主要成果:

  • 证据支持垂直挤出柔性下层地物质作为主要机制.
  • 一个地密度的逆转,在较不密集的大陆地上出现更密集的ophiolite,凸显了这种浮力挤出.
  • 该地区的活跃裂 (大约. 6亿年前,25毫米/年) 便于这一过程.

结论:

  • 由地密度逆转驱动的浮动垂直挤出是形成变态核心复合体的关键机制.
  • 这种机制在密度差异较大的地区特别有效,比如D'Entrecasteaux群岛.
  • 这些发现可能适用于其他经历热膨胀和地密度下降的区域.