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Genetic Lingo01:11

Genetic Lingo

Overview
Polygenic Traits01:18

Polygenic Traits

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...
Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.In the early 20th century,...
X-linked Traits01:19

X-linked Traits

In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
Human Genetics01:28

Human Genetics

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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関連する実験動画

Updated: Jul 11, 2026

Enrichment of Bruch's Membrane from Human Donor Eyes
10:22

Enrichment of Bruch's Membrane from Human Donor Eyes

Published on: November 15, 2015

補足因子Hポリモルフィズムが,年齢関連の黄斑変性症候群に起因する.

Robert J Klein1, Caroline Zeiss, Emily Y Chew

  • 1Laboratory of Statistical Genetics, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.

Science (New York, N.Y.)
|March 12, 2005
PubMed
まとめ

補足因子H遺伝子 (CFH) の一般的な変異は,年齢関連の黄斑変性 (AMD) と強く関連しています. リスクアレルの2つのコピーを持つ個人は,AMDを発症する可能性が7.4倍高い.

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A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
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A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging

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A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence
08:54

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

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関連する実験動画

Last Updated: Jul 11, 2026

Enrichment of Bruch's Membrane from Human Donor Eyes
10:22

Enrichment of Bruch's Membrane from Human Donor Eyes

Published on: November 15, 2015

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
09:37

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging

Published on: July 14, 2016

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence
08:54

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科学分野:

  • 遺伝学 遺伝学とは
  • オフタルモロジック (眼科)
  • 分子生物学は分子生物学である.

背景:

  • 年齢関連の黄斑変性 (AMD) は,高齢者の視力喪失の主な原因です.
  • 遺伝的要因は,AMDの病原性に関与しており,リスク変異の識別が必要である.

研究 の 目的:

  • ゲノム全体のスクリーンを実施し,AMDに関連する遺伝的ポリモルフィズムを特定します.
  • AMD発症のリスクを与える遺伝子の内にある特定の変異を特定する.

主な方法:

  • 96例のAMD症例と50例の対照群で116,204の単核性多型性 (SNPs) の全ゲノムゲノタイプ化を行った.
  • アソシエーション分析は,AMD状態と有意に結びついているSNPを特定するために行われます.
  • 識別されたリスク変種とそのタンパク質レベルの影響を特徴付けるための再シーケンシング.

主要な成果:

  • 補足因子H遺伝子 (CFH) の一般的な内経変異は,AMDと強い関連性を示した (P < 10 7).
  • リスクアレルの同同胞性により,AMDの確率は7.4倍に増加しました.
  • 関連ポリモルフィズムは,ヘパリンとC反応性タンパク質の結合に関与する領域であるCFHタンパク質のアミノ酸402のチロシンからヒスティジンへの変化をもたらした.

結論:

  • 特定されたCFH遺伝子変異は,年齢関連の黄斑変性障害の重要な遺伝的リスク因子です.
  • CFH Y402Hポリモルフィズムは,変異したタンパク質の相互作用を通じて,AMDの病原化に寄与する可能性があります.
  • この発見は,AMDにおけるコンプリメントシステムの役割を強化し,CFH遺伝子の重要性を強調しています.