ANP 443 Lecture Notes - Lecture 25: Genetic Drift, Allele Frequency, Microevolution
Document Summary
Genetic evolution. a change in gene frequency between generations. Natural selection the process by which the life forms that are best suited to survive and reproduce in a particular environment do so in greater numbers than other members of the same population. Certain areas give different environmental pressures leading to new species. > not about an individual"s survival, but about the genes passed down to subsequent generations. "the random changes in allele frequencies between generations" Does not reflect whether alleles are beneficial or harmful. > religion, economic and social status, technology, cultural biases, norms, laws, customs. In class example: brazil a colony of portugal. >> legacy of the dutch populations- bright green eyes and really tall. "if you maintain gene flow you maintain a species" > we are all filled with mutations, but most of them have no effect on our life. > the ones that do give advantages end. > advantages relative to the environment in which you live.
