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相关概念视频

Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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What is Population Genetics?01:25

What is Population Genetics?

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A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
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Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

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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.
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Genetic Drift03:33

Genetic Drift

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Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
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Overview of Transposition and Recombination02:13

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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Genetic Variation01:25

Genetic Variation

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Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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通过统计遗传学研究移动元素变异.

Shohei Kojima1

  • 1Genome Immunobiology RIKEN Hakubi Research Team, RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045, Japan. shohei.kojima@riken.jp.

Human genome variation
|May 30, 2024
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概括
此摘要是机器生成的。

移动元素变化 (MEV) 是关键的结构变化. 将MEV整合到统计遗传学中有助于理解复杂的特征和疾病,揭示皮肤疾病等疾病的潜在因果变异.

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Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
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科学领域:

  • 遗传学 是一个遗传学.
  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 结构变异 (SVs) 对于理解人类特征和疾病至关重要.
  • 移动元素变异 (MEVs) 占人类 SVs 的很大一部分.
  • 测序和变异调用方面的进步促进了 SV 分析.

研究的目的:

  • 探索MEV在统计遗传学中的作用.
  • 从全基因组测序 (WGS) 数据中识别和基因型化MEV的方法.
  • 调查MEVs对基因表达和疾病关联研究的影响.

主要方法:

  • 从短读WGS数据开发MEV的变异调用器.
  • 将MEV集成到表达量的特征位置 (eQTL) 分析中.
  • 在全基因组关联研究 (GWAS) 中应用MEV.

主要成果:

  • 与单核酸变异 (SNVs) 相比,MEVs对发现基因表达和疾病的基因组位置的直接影响有限.
  • MEVs有助于产生关于因果变异的假设.
  • 确定了与差异性基因表达相关的MEV,包括与皮肤疾病相关的MEV.

结论:

  • 对于医学遗传学来说,MEVs很重要,它提供了对变异函数的洞察.
  • 需要进一步研究罕见的MEV及其对复杂特征的贡献.
  • 整合MEV增强了对遗传结构和疾病病因学的理解.