Discussion 3 - Discussion 3 Loss and Recovery of wings in...

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Discussion 3: Loss and Recovery of wings in stick insects These are two very different papers, one evolutionary biology-focused and the other focused on developmental biology. Overview: ancestral phasmids were originally wingless, then developed them secondarily - Up until this study, there was no clear documentation present for the reversal of phasmids from flightless to Volant due to its highly unlikely nature - It has been hypothesized that the genes encoding wings, if not in use, would accumulate enough mutations that would block the ability to regain function - Ability to lose and regain wing function is an evolutionary advantage – hypothesis Methods: RNA component of ribosome, genes that encode rRNA can be used to identify taxonomic group, calculate related groups, and estimate divergence rate - Benefits: easy to get to due to conserved flanking region - Repetitive arrangement, makes PCR easy - 18s gene is part of the ribosomal functional core Another method: maximum parsimony Second paper
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