A phylogeny arranges the species in order to reflect the relatedness by descent from a common ancestor. The closely related species came from a recent common ancestor are grouped together. The evolutionary distance can be represented using statistical means. As such, phylo-genetics is a mathematic field. This results in a tree or star shaped diagram (Baldauf, 2003). One problem would be to find the original common ancestral state that is likely to be extinct but can be …show more content…
For allotropic speciation, there is a physical barrier which isolates the population and in sympatric speciation, it happens within one geographical area and a reproductive isolation comes between individuals which have the opportunity to interbreed (Weismann & Frederick 2002). The separation of a phylo-genetic coherent group of individuals into independent evolving lineages is the driving force for biodiversity. Considering geographic perspective major settings can result in speciation. These include sympatric speciation which is under debate because; this case does not involve geographic barriers which reduce the gene flow between the differentiating