Question

Describe phenetic phylogenetic and genotypic classification

Answer 1

Given the phylogeny at top left, a pheneticclassification scheme (above, middle) will emphasize the perceived dissimilarity of birds from scaly tetrapods, whereas a cladistic scheme (above, right) will emphasize the more recent common ancestry of birds with crocodiles.
    Modern phylogenetic classifications emphasize character analyses, which show that birds evolved from dinosaurs: that is, perceptions of bird distinctiveness have changed. Popular discussions (e.g., "Jurassic Park") present this character analysis as showing that "dinosaurs are more similar to birds": that is, perceptions of dinosaur "primitiveness" have changed. This "neo-phenetic" analysis (below) produces a phylogenetic pattern from phenetic criterion.
    A note on terminology: systematists favoring phenetic and cladistic approaches both claim to be doing phylogenetictaxonomy. The latter term is now more closely associated with cladistic taxonomy, whereas phenetics remains associated with 'traditional taxonomy'.