Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Position-effect Variegation02:32

Position-effect Variegation

6.5K
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.
6.5K
Complementation Tests00:49

Complementation Tests

5.1K
A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
5.1K
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

6.7K
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...
6.7K
Cis-regulatory Sequences02:02

Cis-regulatory Sequences

10.1K
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
10.1K
X-Inactivation01:58

X-Inactivation

39.3K
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
39.3K
Crossing Over01:34

Crossing Over

147.9K
Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...
147.9K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Effective population size associated with sky-island distribution in the summit rat, Rattus baluensis, a mountain Bornean endemic.

The Journal of heredity·2026
Same author

From Permits to Samples: Addressing Key Challenges for High-Quality Reference Genome Generation in Europe.

Molecular ecology resources·2026
Same author

Large Inversions Shape Diversification and Genome Evolution in Common Quails.

Molecular ecology·2025
Same author

Global meta-analysis shows action is needed to halt genetic diversity loss.

Nature·2025
Same author

Potential Adaptive Introgression From Dogs in Iberian Grey Wolves (Canis lupus).

Molecular ecology·2025
Same author

Contextualising samples: supporting reference genomes of European biodiversity through sample and associated metadata collection.

npj biodiversity·2024

関連する実験動画

Updated: Sep 10, 2025

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras
09:38

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras

Published on: May 31, 2014

11.1K

染色体逆転が冬場を共有するクイールの食事の違いと関連している

Celia Vinagre-Izquierdo1, Ines Sanchez-Donoso1, Jennifer A Leonard1

  • 1Conservation and Evolutionary Genetics Group Estación Biológica de Doñana (EBD-CSIC) Seville Spain.

Ecology and evolution
|August 22, 2025
PubMed
まとめ

特定の染色体の逆転は 独特の特徴と 限られた移動と関連しています 遺伝的に異なる2つの集団が 冬の間共存し,彼らの行動や資源利用に影響を与えます

キーワード:
染色体逆転ダイエット配列決定による遺伝子型決定移動する安定した同位体

さらに関連する動画

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
07:34

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

8.3K
Analysis of Neural Crest Migration and Differentiation by Cross-species Transplantation
09:03

Analysis of Neural Crest Migration and Differentiation by Cross-species Transplantation

Published on: February 7, 2012

22.9K

関連する実験動画

Last Updated: Sep 10, 2025

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras
09:38

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras

Published on: May 31, 2014

11.1K
Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
07:34

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

8.3K
Analysis of Neural Crest Migration and Differentiation by Cross-species Transplantation
09:03

Analysis of Neural Crest Migration and Differentiation by Cross-species Transplantation

Published on: February 7, 2012

22.9K

科学分野:

  • 進化の遺伝学
  • 行動エコロジー
  • 保護生物学

背景:

  • 染色体逆転は遺伝的差異化と適応の重要な原動力である.
  • コートルニックスコートルニックス (Coturnix coturnix) の大きな逆転は,体サイズや飛行効率などの特徴に影響を与え,移住に影響を与える可能性があります.

研究 の 目的:

  • 特定の染色体逆転の頻度が高いことが,イベリア南部に常住するの存在を説明するかどうかを調査する.
  • スペイン南部で冬を過ごす カタツムリのゲノム構成や形状 移住の行動を分析する

主な方法:

  • 冬を過ごすクジラ群を調査した.
  • ゲノム組成,形状,安定した同位体比 (デウテリウム,窒素,炭素) を分析した.
  • 安定した同位体シグネチャーから推測された 移動行動と食事

主要な成果:

  • クロモソームの逆転と逆転のないの共存が確認され,異なる形状と移動行動を示した.
  • 逆向きのクイールは 移動が限られていて 逆向きのクイールは 他の緯度から来たようです
  • 移動するクワイルドは,住み寄るクワイルドと比べて食事の違いを示した.

結論:

  • 冬眠地には2つの異なる共存する染色体系が存在し,形態学,行動,資源使用が異なります.
  • 逆転内の再結合の欠如は,これらの系統間のさらなる分岐を促進すると予想されます.
  • この染色体ポリモルフィズムが 常見のの生態学と進化のダイナミクスに 重要な役割を果たしています