BIOLOGY 1M03 Chapter Notes - Chapter 25: Allele Frequency, Inbreeding Depression, Genotype Frequency
14 Sep 2016
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Produces a hierarchy of life or linear progression through time: where things get progressively more complex or better, bacteria is no less evolved then humans, complexity can actually also be reduced ie. the loss of limbs in snakes. Animal behaviour is selfless and is for the good of the species: selfish alleles would increase since they would be the ones to survive, kin selection: behaviour that benefits close relatives. Example of goodness or altruism in nature. Naked mole rats who give up their reproductive rights. Since their genes are being passed on to future generations indirectly. Favours one trait but compromises other traits ie. evolution of brain size in humans pleiotropic: a single gene has effects on multiple phenotypes. Historical constraints ie. the evolution of limbs species evolve from ancestors the available tools that evolution needs to work with evolution must modify existing traits (it cannot create new ones)
