相关实验视频
Updated: May 27, 2025
12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
35.3K
在理论计算机科学中的进化树的形状参数
1Department of Mathematical Sciences, National Chengchi University, Taipei 116, Taiwan, Republic of China.
概括
在遗传学中研究的进化树形状参数与计算机科学中的随机二进制搜索树相同. 这项调查揭示了这些联系和计算机科学工具,用于分析树形状.
科学领域:
- 人类遗传学和计算机科学
背景情况:
- 进化树 (尤尔模型) 和随机二进制搜索树 (计算机科学) 的形状参数已被独立研究.
- 这些参数,如平衡指数,分别测量进化关系和算法运行时间.
研究的目的:
- 为了突出形状参数分布在遗传学和计算机科学之间的令人惊的联系.
- 引入计算机科学中的计算工具,用于分析遗传学中的随机结果.
主要方法:
- 在Yule模型和随机二进制搜索树下对形状参数分布进行比较分析.
- 审查计算机科学中开发的随机分析工具.
主要成果:
- 形状参数在Yule模型和随机二进制搜索树中表现出相同的分布.
- 这种分布等价性导致了两个领域的收性发现.
结论:
- 利用计算机科学方法可以推进对遗传树形状的分析.
- 了解这些跨学科联系为进化研究提供了新的视角和工具.
相关概念视频
03:21Phylogenetic Trees
45.0K
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.
45.0K
02:54Evolutionary Relationships through Genome Comparisons
5.7K
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...
5.7K
01:23Phylogeny
43.5K
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.
43.5K
01:19Survival Tree
52
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
52
02:05Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
02:31Synteny and Evolution
3.2K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.2K