evolution
A group of very similar organisms that can interbreed and produce fertile offspring
species
variety of traits being passed on from generation to generation.
diversity
the total number of different gene variations available to a species
gene pool
the parent species from which two or more separate species evolved
common ancestor
the inability of populations to interbreed due to any number of barriers
reproductive isolation
Organisms of the same species that live in the same place at the same time.
population
any physical characteristic or behavior that helps an organism to better survive
adaptation
having a variety of traits resulting in differences within a species and among different species
genetic diversity
the accumulation of differences that results in the formation of different species from a common ancestor
divergent evolution
separation of a population due to a specific barrier
geographic isolation
favors organisms with extremes in both directions and eliminates the traits in the middle.
disruptive selection
the gradual change of organisms over time
evolution
changes in the genetic code
mutations
the formation of a new species through the process of divergent evolution
speciation
a type of reproductive isolation between populations due to differences in courtship or other mating behaviors
behavioral isolation
favors extreme forms of traits
directional selection
the place where an organism lives
habitat
the movement of an organism AWAY from a poplulation
emigration
the formation of a new species by geographic isolation
allopatric speciation
a type of reproductive isolation between populations due to differences in the size, shape and or location of genitalia
mechanical isolation
Natural selection favors the average individuals in a population
stabilizing selection
the passing on of genes to the next generation
reproductive success
genetic drift that results from a devastating event that greatly reduces the population size and the diversity of genes in the population
bottleneck effect
genetic drift that results when a new colony is formed by a small population with a limited gene pool
founder effect
a type of reproductive isolation that occurs when a species develops different reproductive cycles
temporal isolation