1microevolution
an evolving population is one that is showing genetic change over generations, if actual ratios dont match H-W ratios, then the population is evolving
2mechanism of Microevolution
natural selection, genetic drift, gene flow
3genetic drift
genetic frequency Cheadle to random events. Outcomes are random changes in allele frequency in either direction, reduces diversity, alleles may become fixed or lost
4bottleneck effect
an event drastically cuts population size, the gene pool of survivors is random, some alleles may be lost
5gene flow
alleles move in and out of the population from the migration of adults, dispersal of gametes, seeds, etc. this adds diversity to population and reduces different between populations
6directional selection
shifts character mean value to one direction
7disruptive selection (diversifying)
intermediates are les fit than the extremes, so the
8stabilizing selection
intermediate types more foot than extremes
9binomial nomenclature
aka the scientific name for species
10taxonomy
grouping species together based on similarities
11taxonomic levels
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species (Dashing King Philip Came Over For Good Soup)
12clade
a the species in a clade share homologies
13orthologous genes
are inherited from common ancestor