BIO 200 Study Guide - Midterm Guide: Genetic Drift
1 Dec 2014
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. 18x500 = 90 (number of dragons in pop) Humans intentionally choosing specific individuals to survive and die. Genetic changes with natural population occur because of reproductive success. Mtdna indicates dogs derived from am species of grey wolf. Differences in mortality and reproduction leads to differences in proportions of alleles. Selective advantage for one allele, favored allele increases in population. New individuals are cause for spike in graph. Slight advantages over a long time= enormous change. Compare success of favored allele to that of un-favored one. W (fitness) _= number of children per 100 dwarf parents. Un-favored allele would be eliminated unless there are high mutation rates. Selection favoring heterozygoted aa can only occur if incomplete or co-dominance because trait is expressed e. g. sickle cell. Heterozygotes favored because they are more resistant to malaria. Both organisms benefit from relation ship: resource- resource, resources are exchanged, mycorhize =plants. Resources provided by one service by the other.
