BIOA01H3 Lecture Notes - Monarch Butterfly, Cytochrome C, Pseudogene
9 May 2013
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Genes in cytochrome c (used for cellular respiration) Nearly identical in app species: suggests that they"re all related. Dna sequences that"s part of a non-functional gene. Once functional, but not anymore; evidence of evolutionary past. L-gulonolactone oxidase is an enzyme that creates vitamin c in most mammals. Mutation caused this to be deactivated in all primates. So once it works, but now it doesn"t because we"ve evolved. Uses sequence data from dna or proteins to make trees to show relationships. Individuals having any advantage, however slight over others, would have the best chance of surviving and procreating their kind? . Any variation in the least degree injurious would be rigidly destroyed. This preservation of favourable variations and the rejection of the injurious variations i call natural selection. Natural selection: selection of the favorable characteristics and rejection of unfavorable characteristics: more individuals are born than can survive. Leads to competition among individuals within a population.
