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Sagot :
The number of nodes separating two taxa on a tree represents how closely related they are.
What is phylogeny?
A phylogenetic tree, like the straightforward one below outlining the evolutionary links between the great apes, is frequently used to represent a phylogeny. Orangutans fall under the species Pongo, chimpanzees and bonobos fall under the genus Pan, humans fall under the genus Homo, and gorillas are self-evident. Phylogeny is the study of a species' or group's evolutionary history, particularly as it relates to relationships and lines of descent among large groups of animals. phylogeny.
What causes phylogeny?
If there are genetic exchanges across species, the quantity and type of transfers that certain genes have undergone will have an impact on their phylogenetic relationships. It is common knowledge that gene conflicts in bacterial gene trees frequently result from horizontal gene transfers. The patterns of shared ancestry between lineages are traced through phylogenies. There are elements of each lineage's history that are exclusive to it alone and elements that are shared with other lineages. Similar to this, every lineage has both ancestors that are exclusive to that lineage and ancestors that they have in common with other lineages.
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