Genes
The number of times that on allele occurs in a gene pool.
Allele Frequency
The process by which two species evolve in responses to changes in each over time
Co-Evolution
The form of reproductive isolation in which two populations are separated by geographic barriers such as rivers, mountains, or bodies of water, leading to the formation of two separate subspecies
Geographic Isolation
Term to describe a species that has died out and has no living members
extinct
Structures that are similar in different species of common ancestors.
Homologous Structure
The sum total of all the different forms of Genetic information carried by a particular species, or by all organisms on Earth
Genetic Drift
Unrelated organisms independently evolve similarities when evolving to similar environments
Convergent Evolution
___ is the process by which organisms that are most suited to their environment survive and reproduce most successfully, also called survival of the fittest
Natural Selection
Preserved remains of an ancient organism
Fossil
Change over time; the process that modern organisms come from ancient ones
Evolution
All the genes including all the different alleles for each gene, that are present in a population at any one time
Gene Pool
Speciation
individuals at the lower and upper ends of the curve have higher fitness.
Disruptive Selection
Chance in allele frequency as a result of the migration of the subgroup of a population
Founder effect
Body Parts that share a common function, but not an evolutionary history
Analogous Structure
The situation in which allele frequencies in a population remain the same.
Genetic Equilibrium
Evolution of a species by gradual accumulation of small genetic over long periods of time
Gradualism
Form of natural selection in which individuals at one of the directional curve have higher fitness then the ones on the middle
Directional Selection
A change in allele frequency failing a dramatic decline in population
Bottleneck effect
The movement of genes into or out of a population