BIOLOGY 1M03 Lecture Notes - Lecture 12: Alternative Hypothesis, Multicellular Organism, Teleost
1 Feb 2017
School
Department
Course
Professor
Document Summary
Case study: adaptive radiation of fanged frogs. Case study: adaptive radiation, then mass extinction of cichlids in lake victoria. Convergence of dna can be seen to occur as well. Maximum parsimony : assumes that the best explanation / pattern is the one that implies the last amount of change. Support for the whippo hypothesis: recent data on gene sequences (sine"s) show that whales and hippos share many. Sine genes that are absent in other artiodactyl groups these short interspersed nuclear elements (sine"s) are shared derived traits (synapomorphies) and support hypothesis: further supported by the contention that homoplasy in sine"s = very rare compared to morphology. Many species are not easily distinguished by morphology. Animals and plant parets are also sometimes not easily identified. Most diverse parts of the world are also the least known. Barcoding high thourhgput classification of diversity based on a variable gene. Based on dna sequence of one gene for animals (cytochrome oxidase 1 co1)
