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相关概念视频

Incomplete Dominance01:43

Incomplete Dominance

22.0K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
13.2K
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
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Heritability01:06

Heritability

194
Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
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Probability Laws01:49

Probability Laws

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Overview
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Updated: Jun 11, 2025

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA

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特定于种群的假定因果变异塑造了定量特征.

Satoshi Koyama1,2,3, Xiaoxi Liu4, Yoshinao Koike4,5,6

  • 1Laboratory for Cardiovascular Genomics and Informatics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.

Nature genetics
|October 3, 2024
PubMed
概括
此摘要是机器生成的。

这项研究确定了4423个与日本个体63个特征相关的基因位点,发现了601个新的关联和9406个潜在的因果变异,包括非编码变异的新机制.

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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA

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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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科学领域:

  • 人类遗传学 人类遗传学
  • 基因组关联研究是基因组相关研究.
  • 定量性特征位置 (loci loci) 是一个定量性特征位置.

背景情况:

  • 人类遗传变异通过复杂的,往往未知的机制影响特征.
  • 大规模的遗传研究对于理解特征关联至关重要.
  • 特定种群的遗传架构需要专门的调查.

研究的目的:

  • 在日本人口中识别与定量特征相关的显著遗传位置和假定因果变异.
  • 发现新的遗传关联,并探索非编码变异的机制.
  • 为功能验证提供精细映射的因果变异资源.

主要方法:

  • 结合了大约26万名日本参与者的数据.
  • 使用了日本特有的基因型参考面板.
  • 采用统计精细映射技术来识别因果变异.

主要成果:

  • 在63个定量特征中确定了4,423个显著的位点,包括601个新的关联.
  • 发现了9406种假定因果变异,包括编码,拼接和非编码类型.
  • 在TNNT2 (心脏功能) 中发现了日本特有的变异,例如rs730881101在TNNT2 (心脏功能) 中和rs13306436在IL6 (炎症,结核病耐药性) 中.
  • 证明了非编码变体,包括3' UTRs中的变体,可以具有显著的效果和新的机制,如rs13306436赋予对mRNA降解的抗性.

结论:

  • 这项研究提供了大量日本队列中遗传关联的全面地图.
  • 它强调了群体特异性遗传研究和精细地图为变体发现的重要性.
  • 这些发现为功能研究提供了有价值的候选因果变体清单,并揭示了遗传特征确定的新机制.