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相关概念视频

Gene Duplication and Divergence02:37

Gene Duplication and Divergence

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The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
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Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Genome Size and the Evolution of New Genes03:21

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Synteny and Evolution02:31

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
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相关实验视频

Updated: Sep 14, 2025

Electroporation of Sliced Human Cortical Organoids for Studies of Gene Function
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人类特异性的基因扩张有助于大脑的进化

Daniela C Soto1, José M Uribe-Salazar1, Gulhan Kaya1

  • 1Department of Biochemistry & Molecular Medicine, MIND Institute, University of California, Davis, Davis, CA 95616, USA; Genome Center, University of California, Davis, Davis, CA 95616, USA.

Cell
|July 22, 2025
PubMed
概括

人类特异性的基因重复是大脑进化的关键. 研究人员在所有人类中发现了362个对应基因,其中两个基因是GPR89B和FRMPD2B,它们在人类大脑发育和特征中发挥了潜在的作用.

关键词:
大脑副本数量的变化基因复制基因表达人类进化自然选择神经发育分段重复测序方式斑马鱼

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科学领域:

  • 基因组学
  • 进化生物学
  • 神经科学

背景情况:

  • 人类血统中的基因重复事件被假设为驱动大脑进化.
  • 鉴定这些重复的基因是由于基因组组装错误而具有挑战性的.

研究的目的:

  • 识别人类特异性基因家族和对应基因对人类大脑特征有所贡献.
  • 研究这些基因在大脑发育中的功能作用.

主要方法:

  • 使用完整的端粒对端粒基因组序列进行基因发现.
  • 采用长读DNA测序来检测现代人类基因组中的选择特征.
  • 创建斑马鱼CRISPR淘汰模型并进行mRNA人性化实验.

主要成果:

  • 在所有测试的现代人类基因组和大脑转录组中发现了213个人类特异性基因家族,其中362个是对应基因组.
  • 检测到特定类型的选择特征,包括CD8B.
  • 在斑马鱼模型中,GPR89B与剂量依赖的大脑扩张以及FRMPD2B与突触信号发生改变有关.

结论:

  • 这项研究为了解人类大脑演变中的基因扩张提供了全面的资源.
  • GPR89B和FRMPD2B被强调为人类大脑特征的潜在贡献者.