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関連する概念動画

Monohybrid Crosses01:20

Monohybrid Crosses

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Overview
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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
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Polygenic Traits01:18

Polygenic Traits

68.6K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
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Chromosomal Theory of Inheritance01:39

Chromosomal Theory of Inheritance

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In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
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Law of Segregation01:49

Law of Segregation

77.1K
When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.
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Law of Independent Assortment02:03

Law of Independent Assortment

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While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.
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関連する実験動画

Updated: Dec 17, 2025

Functional Cloning Using a Xenopus Oocyte Expression System
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Functional Cloning Using a Xenopus Oocyte Expression System

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モノジェニックとポリジェニックの遺伝は クローン選択の手段となる

Po-Ru Loh1,2, Giulio Genovese3,4,5, Steven A McCarroll6,7,8

  • 1Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. poruloh@broadinstitute.org.

Nature
|June 26, 2020
PubMed
まとめ
この要約は機械生成です。

既得変異によって引き起こされる年齢関連のクローン血形成は 血液がんのリスクを高めます これらの変異と相互作用する遺伝的遺伝子変異は 生涯にわたる血液細胞生産に 課題をもたらします

さらに関連する動画

High-throughput Screening for Protein-based Inheritance in S. cerevisiae
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High-throughput Screening for Protein-based Inheritance in S. cerevisiae

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Clonal Genetic Tracing using the Confetti Mouse to Study Mineralized Tissues
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Clonal Genetic Tracing using the Confetti Mouse to Study Mineralized Tissues

Published on: October 23, 2019

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関連する実験動画

Last Updated: Dec 17, 2025

Functional Cloning Using a Xenopus Oocyte Expression System
09:40

Functional Cloning Using a Xenopus Oocyte Expression System

Published on: January 30, 2016

8.5K
High-throughput Screening for Protein-based Inheritance in S. cerevisiae
08:12

High-throughput Screening for Protein-based Inheritance in S. cerevisiae

Published on: August 8, 2017

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Clonal Genetic Tracing using the Confetti Mouse to Study Mineralized Tissues
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Clonal Genetic Tracing using the Confetti Mouse to Study Mineralized Tissues

Published on: October 23, 2019

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科学分野:

  • 遺伝学
  • 血液学
  • ゲノミクス

背景:

  • 年齢とともに一般的になるクローナル血液形成は,体内の変異を伴う血液細胞の拡張を伴い,血液がんのリスクが増加します.
  • 既存の研究は,血液クローンにおける多様な染色体変異を示しているが,クローン拡大の原動力は不明である.

研究 の 目的:

  • ミュータントの血液クローンに選択的優位性を与える遺伝子,変異,生物学的プロセスを特定する.
  • 大規模なコホートにおける既得変異と遺伝的変異の関係を分析する.

主な方法:

  • 482,789人の英国バイオバンク参加者のゲノタイプデータ分析
  • 19,632 個のオートソームモザイク染色体変異の特定と分析
  • 遺伝変異体と得られた複製中立性喪失 (CN-LOH) 変異体との関連を調べる.

主要な成果:

  • CN-LOHの特異的な変異を持つ7つの遺伝子の希少変異は,クローナル血液形成に対する脆弱性を有意に増加させた.
  • MPL,FH,NBN,MRE11,ATM,SH2B3,TM2D3を含む遺伝子の遺伝的リスクアレルを体系的に置き換えたまたは複製した.
  • CN-LOH変異は,同種の染色体セグメントの置換を促進し,血液形成細胞の増殖のための多遺伝的駆動を増加させた.

結論:

  • 遺伝的な変異は,得られた変異と相互作用して,クローン血球形成を誘導する.
  • DNA損傷反応 (MRE11,NBN,ATM) と幹細胞の自己再生 (MPL,SH2B3) に関する特定の遺伝子が関与しています.
  • 遺伝と獲得された変異の相互作用は,生涯にわたって血液細胞の生産を維持するための課題を提示します.