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関連する概念動画

Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Position-effect Variegation02:32

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...

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Updated: Jul 10, 2026

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
10:17

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations

Published on: November 3, 2010

霊長類の遺伝子発現パターンの種内および種間多様性.

Wolfgang Enard1, Philipp Khaitovich, Joachim Klose

  • 1Max-Planck-Institute for Evolutionary Anthropology, Inselstrasse 22, D-04103 Leipzig, Germany.

Science (New York, N.Y.)
|April 16, 2002
PubMed
まとめ

人間とチンパンジーの遺伝子発現は,特に脳では著しく異なります. この研究は,ヒトの遺伝子およびタンパク質発現における顕著な変化を明らかにし,種の違いに貢献しています.

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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

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関連する実験動画

Last Updated: Jul 10, 2026

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
10:17

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations

Published on: November 3, 2010

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks
08:51

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
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科学分野:

  • 進化生物学の進化生物学について
  • ゲノミクスゲノミクスとは
  • 比較トランスクリプトミクス

背景:

  • 人間とチンパンジーは,ゲノムDNAの98.7%を共有しています.
  • 高い遺伝的類似性にもかかわらず,重要な形態学的,行動的,および認知的な違いが存在する.
  • 変異した遺伝子発現は,これらの種特有の特徴の潜在的な原動力である.

研究 の 目的:

  • ヒト,チンパンジー,オランウータン,マカークの種別遺伝子およびタンパク質発現パターンを調査する.
  • 人間とその最も近い親戚との違いの遺伝的根拠を特定する.
  • 遺伝子発現,特に人間の脳における進化的変化を調査する.

主な方法:

  • 血液白血球,肝臓,脳組織におけるマイクロアレイを用いたトランスクリプトーム比較分析.
  • 人間とチンパンジーの2次元ゲル電泳を用いた比較タンパク質解析.
  • 進化の距離をモデル化するために3種のマウスを含めた.

主要な成果:

  • 研究された霊長類全体で,種特異な遺伝子発現プロファイルが特定されました.
  • 人間の脳内の遺伝子およびタンパク質発現の特に顕著な変化が観察されました.
  • 遺伝子発現パターンの有意な差異が,密接に関連した種間でも示されています.

結論:

  • 遺伝子とタンパク質の発現の変化は,人間の進化において重要な役割を果たしています.
  • 人間の脳は,遺伝子発現レベルにおいて,独特で加速された進化的変化を示しています.
  • 比較トランスクリプトミクスとプロテオミクスは,種の多様性を理解するための強力なツールです.