Systematics and Reconstructing Phylogeny - Essay Example

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The first name is usually the genus name and the second name is usually the specific name. Species are classified into levels based on the hierarchical system beginning with domain, kingdom, phylum, class, order, family genus and species…
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Systematics and Reconstructing Phylogeny
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Systematics and Reconstructing Phylogeny

Evolutionary phylogeny is the evolutionary history of a group of organisms derived from a common ancestor. There are three groups; monophyletic taxon which has a common ancestor and all of its descendants, paraphyletic taxon which has a common ancestor but not all of its descendants and polyphyletic taxon which has a group of species with different common ancestors. It misrepresents evolutionary relationships. Clades are true evolutionary relationships depicted by monophyletic groups. Parsimony is used to assess alternate phylogenetic hypotheses. Systematics has a future in molecular systematic which determines evolutionary relationships by comparison of macromolecules like ribosomal RNAs and mitochondrial RNA, powerful analysis computers and DNA barcoding. For macromolecules, molecular clocks are used to estimate time of divergence through differences in proteins. DNA barcoding is efficient in varied geographical settings, and in varied taxonomic groups. It has a 99.99% resolution.
In attending this lecture, I realized that my personal ability to follow and take notes had improved and I could take notes faster and comprehensively with my concentration levels been consistent for much of the lecture. I chose to attend this lecture as it is related to my field of study which is microbiology and I have an interest in learning more about the nature of the courses I shall undertake in my graduate program. The concepts taught in this lecture are related to my field of study through their assessments of organism classification. Read More
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