Evolution
The Four Fundamental Forces
What are they?
Random Genetic Drift
Occurs when genetic variation is lost due to a random chance event.
Mutation
Changes to alleles in the genome provide genetic variation, which can be worked on by selection!
Gene Flow
When genes enter a new population, adding to the gene pool, or when genes leave a gene pool, possibly leading to speciation.
Selection!
Probably the force of evolution most responsible for our diverse biosphere, selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring.