BIO152H5 Lecture Notes - Lecture 14: Allele Frequency, Genotype Frequency, Bundesautobahn 45
Document Summary
Lecture 14: genetic variation and the hardy weinberg. A gene pool contains the variation that produces differing genotypes and phenotypes. Most populations are genetically variable: ex. selection response in maize. To select for high content of oil, do that because corn plant has variability (genetic info for oil production) Geographical variation --> ex. cyanide at warmer temp produced. Much genetic variation within many species is maintained in distinct subpopulations. A population evolves when individuals with diff genotypes survive and reproduce at diff rates. An organisms phenotype is the result of a complex series of developmental processes influenced by genes and environmental factors. Natural selection - increase in frequency of certain alleles. Those alleles make organism best adapted to the environment. Genetic drift - causes allele frequencies to change randomly (b/c small population) Gene flow - equalize b/w pop or gain/lose alleles depending on where pop settled. Occurs when individuals immigrate or emigrate from a population: allele frequencies may change.
