MMW 11 Chapter Notes - Chapter Essays 10, Definitions, Models: Mitochondrial Eve, Parallel Evolution, Genetic Recombination

• School: UCSD
• Department: Making of the Modern World
• Course: MMW 11
• Professor: David Jordan

Document Summary

Speciation development of a new species via evolution. World before dna research: candelabra model view that humans were involved in perfect parallel evolution (straight from primates to us, out of africa hypothesis. Modern human populations in eurasia could not have evolved from earlier. Eurasian fossil populations; evolved from migrations coming out of africa. Not been sufficient time/ changes in selective pressure. Explains why all modern humans were the same species: multiregional evolution hypothesis. Speciation slow enough that afroeurasia had once been home to a single great hominid population. Proposes that hominid forms evolved not in parallel but as a single, very diverse species. Explains why there were similar forms around world at same time. Abandoned because dna evidence does not support it. Dna research: mitochondrial eve: model (how we describe mitochondrial eve) Mitochondrial dna (mtdna) no in cell nucleus -> cannot be subject to genetic recombination during meiosis or mixing of male and female genetic material.