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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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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.