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Unformatted text preview: help with this process? • After homologous sequences are aligned, phylogenetic trees are reconstructed by computers o Describe these three reconstruction programs: Distance methods Parsimony methods Likelihood methods • Even though phylogenetic trees mainly use ssu rRNA (a small portion of an entire genome), studies using larger portions of the genome devoted to protein synthesis show similar evolutionary relationships o Why? These components interact with each other and coevolve DNA/DNA Hybridization • What is metagenomics , and how does it allow us to obtain genomic sequences for normally uncultivatable microbes? This picture explains DNA/DNA Hybridization fairly well. Note that that DNA/DNA hybridization methods are relatively outdated. This method was once used to gage how closely organisms were related to one another....
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- Spring '11
- DNA, earliest classification systems, good molecular chronometer