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相关概念视频

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Lineage Commitment01:21

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Commitment is the  process whereby stem cells:
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Gene Duplication and Divergence02:37

Gene Duplication and Divergence

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The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
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Pedigree Analysis01:35

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Overview
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Phylogenetic Trees03:21

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Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
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Phylogeny01:23

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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Updated: Jun 4, 2025

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
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使用血统条形码数据重建原始状态层次和动态.

Weixiang Fang1,2, Yi Yang1,2, Hongkai Ji3

  • 1Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Methods in molecular biology (Clifton, N.J.)
|January 2, 2025
PubMed
概括
此摘要是机器生成的。

定量命运映射 (QFM) 使用血统条形码来跟踪细胞发育. 这个计算管道分析了原始细胞动态和命运限制,为了解细胞命运变化提供了一个框架.

关键词:
冰期 - 冰期 - 冰期血统条形码管道的管道.谱系追踪 谱系追踪 谱系追踪植物时代 (Phylotime) 是一个时代.原始状态动态的原始状态动态.量化命运映射 (QFM) 是一种方法.时间尺度的细胞原生学.

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科学领域:

  • 发展生物学 发展生物学
  • 计算生物学 计算生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 使用谱系条形码对单细胞细胞系的测量变得越来越可行.
  • 了解原始细胞动态和命运限制对于发育研究至关重要.

研究的目的:

  • 描述定量命运映射 (QFM) 和其计算管道.
  • 为了能够在发育过程中查询原始细胞动态和命运限制.

主要方法:

  • 通过Phylotime模型推断细胞原型.
  • 用 ICE-FASE 算法重建原始状态等级,承诺时间,人口规模和承诺偏差.
  • 使用原始状态覆盖率统计数据评估采样充分性.

主要成果:

  • 菲洛时代模型从血统条形码数据推断出细胞系谱.
  • ICE-FASE算法重建了关键的原始细胞动态.
  • 原始状态覆盖率统计对于解释QFM结果至关重要.

结论:

  • QFM为表征细胞命运动态提供了一个一般的框架.
  • 血统条码数据与计算工具相结合,可以对发育过程进行详细分析.
  • 这种方法有助于更深入地了解细胞承诺和人群动态.