Blog, Phylogenetic
Contract the UPGMA tree Neighbor Joining tree Maximum Parsimony Tree & Maximum Likelihood Tree
Category: Phylogenetic
Blog, Phylogenetic
These approaches simultaneously compare all sequences in the alignment, considering a one character (a site in the alignment) at a time to calculate the tree score Tree score is a quantitative measurement of the particular phylogenetic tree fits the observed data. The tree score of the Maximum parsimony (MP) – minimum numbers of changes required … Read More “Character based approach of phylogenetic analysis” »
Blog, Phylogenetic
The distance between every pairs of sequences are calculated, resulting data matrix is used for tree reconstruction. Clustering procedure of the distance base analysis is given below. Calculate distances and produce the matrix between all combination of taxa. Join the two closest clusters. Recalculate the distances between all the clusters. Repeat the above procedure until … Read More “Distance based approach of phylogenetic analysis” »
Blog, Phylogenetic
Taxa – The group of organisms, that are classified based on the evolutionary relationships. Characters – specific traits or features that can be used to distinguish between different taxa. The characters that used for building the phylogenetic trees Classical phylogenetic analysis uses morphological features – number of legs, anatomy Modern phylogenetic analysis uses molecular information … Read More “Phylogenetic Analysis data” »
Blog, Phylogenetic
Evolutionary medicine Using positive selection to identify the pathogenic mechanisms of HIV in human. Using the evolutionary analyzes to identify new disease out breaks. Learn about the origin of the diseases. Identify the diseases resistance mechanisms in other hosts to identify the better treatments. Population studies – population structure and the subdivisions. Studying mating systems … Read More “Applications of the phylogenetic Analysis.” »
Blog, Phylogenetic
Phylogenetic analysis is the finding of the genetic relationships among organisms. Phylogeny is the study of an organism’s evolutionary history; it includes time (when), mode (how), and place (where). Systematic is the classification and studying the diversity of organisms based on their phylogenetic relationships. Modern phylogenetics is highly revolutionized by molecular data. All life on … Read More “Connecting the Dots in Evolution: An Introduction to Phylogenetic Analysis :” »
Phylogenetic
Homology Vs Homoplasy Homology is similarity between trait share from common ancestor, most of the homologous characters are recently derived shared characters. Homoplasy is the similarity that are most likely superficially similar (identical on the surface but there is no genetic relation) due to independent evolution and cause misleading of the phylogenetic inferences. The reasons … Read More “Descriptive statistics for phylogenetic trees” »
Phylogenetic
Evolutionary Trees Important terminologies Rooted trees – this tree type shows evolutionary relationships, direction of evolution and the ancestral state Unrooted trees – this tree type only shows the Phylogenetic relationships. Common ancestor – Simply to choose a point (hypothetical point) on the tree as representing the earliest time in the evolutionary history of the sequence data. … Read More “Summarizing Evolutionary Trees” »