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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Dr. sharad agrawal
Cladistics can be defined as the study of the pathways of evolution. In other words, cladists are interested in such questions as: how many branches there are among a group of organisms; which branch connects to which other branch; and what is the branching sequence. A tree-like network that expresses such ancestor-descendant relationships is called a cladogram. Thus, a cladogram refers to the topology of a rooted phylogenetic tree. Phenetics is the study of relationships among a group of organisms on the basis of the degree of similarity between them, be that similarity molecular, phenotypic, or anatomical. A tree-like network expressing phenetic relationships is called a phenogram.