EVOLUTION SUCKS COCK
Terms
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- biogeography
- Scientific study of the world distribution of species
- Darwins book
- the origin of species
- population
- all individuals of the same species that are occypying a specified area
- gene pool
- all genotypes in a population
- allele frequency
- for a given gene locus, the relative abundances of each kind of allele among all the individuals of a population
- genetic equilibrium
- in theory, a state in which a population is not evolving
- Hardy Weinberg Equilibrium
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- large populations
- no mutations
- no immagration/ emigration
- no natural selection - gene flow
- flow of alleles from one population to the next
- 3 types of natural selection
-
- directional selection
- stabilizing selection
- disrubtive selection - genetic drift
- change in allele frequencies over the generations due to chance alone
- founder effect
- where a small number of individuals start a new population
- Prezygotic Isolating Mechanisms
-
before fertilization
- Temporal- species mate at diff times
- Behavioral
- Spatial
- Mechanical
- Gametic - Postzygotic Isolating Mechanisms
-
after fertilization
- sterile - speciation
- formation of a daughter species from a population or subpopulation of a parent species by way of microevolutionary processes
- allopatric speciation
- bounder seperating 2 species ( Isthmus of Panama and fish)
- sympatric speciation
- two species living in the same are but cannot reproduce (polyploidy)
- polypoidy
- having three or more of each type of chromosome
- parapatric
- has a hybrid zone that often gives rise to new species
- conserved
- held with little change over long periods of time (sharks and alligators)
- biological vs. morphological concept of species
- individuals that look the same should be the same species