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Polygenic Traits01:18

Polygenic Traits

64.7K
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...
64.7K
Pleiotropy01:33

Pleiotropy

39.7K
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,...
39.7K
Multiple Allele Traits01:49

Multiple Allele Traits

34.0K
The Concept of Multiple Allelism
34.0K
Epistasis Analysis01:09

Epistasis Analysis

4.9K
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
4.9K
Epistasis01:39

Epistasis

45.7K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
45.7K
Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

324
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
324

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相关实验视频

Updated: Jun 3, 2025

Large-Scale Multi-Omics Genome-Wide Association Studies Mo-GWAS: Guidelines for Sample Preparation and Normalization
08:27

Large-Scale Multi-Omics Genome-Wide Association Studies Mo-GWAS: Guidelines for Sample Preparation and Normalization

Published on: July 27, 2021

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从总结数据中改进多基因预测,通过学习跨多个表型的效应共享模式来改进多基因预测.

Deborah Kunkel1, Peter Sørensen2, Vijay Shankar3

  • 1School of Mathematical and Statistical Sciences, Clemson University, Clemson, South Carolina, United States of America.

PLoS genetics
|January 8, 2025
PubMed
概括

mr.mash-rss只使用来自全基因组关联研究 (GWAS) 的总结统计数据来实现准确的多基因预测. 这种方法提高了多现象型预测模型的适用性和可扩展性,特别是对于缺乏个体级遗传数据的数据集.

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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry

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

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相关实验视频

Last Updated: Jun 3, 2025

Large-Scale Multi-Omics Genome-Wide Association Studies Mo-GWAS: Guidelines for Sample Preparation and Normalization
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Large-Scale Multi-Omics Genome-Wide Association Studies Mo-GWAS: Guidelines for Sample Preparation and Normalization

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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry

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

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科学领域:

  • 人类遗传学 人类遗传学
  • 统计遗传学 统计遗传学
  • 生物信息学是一种生物信息学.

背景情况:

  • 复杂特征的多基因预测对于精准医学至关重要.
  • 马什先生的方法通过共同建模多个表型来改善预测,但需要个人级别的数据.
  • 个人层面的遗传数据往往无法获得或不公开共享.

研究的目的:

  • 介绍Mr.Mash-rss,这是Mr.Mash的扩展,使用总结统计数据.
  • 提高mr.mash对大型生物银行数据集的适用性和可扩展性.
  • 使用公开可用的GWAS总结统计数据,提高多基因预测的准确性.

主要方法:

  • 开发了mr.mash-rss,一种利用总结统计和链接不平衡 (LD) 估计的方法.
  • 通过各种遗传架构的广泛模拟来评估mr.mash-rss的性能.
  • 将mr.mash-rss应用到来自英国生物库的16种血细胞表型的现实数据集.

主要成果:

  • mr.mash-rss在多基因预测中表现出与最先进的方法相比具有竞争力或优越的性能.
  • 该方法在各种场景中显示出高精度,包括不同的效果共享,表型数量和遗传性.
  • 在英国生物银行分析中,mr.mash-rss对大多数血细胞特征的预测准确度更高,特别是采用较小的样本大小.

结论:

  • Mr.Mash-rss有效地将Mr.Mash的实用性扩展到总结统计,扩大了其应用范围.
  • 该方法提供了一个可扩展和强大的工具,用于使用易于获得的GWAS数据进行多现象型多基因预测.
  • 马什-rss代表了精准医学的重大进步,因为它使得基因预测更容易获得和更准确.