Factors influencing the frequency of alleles in a population
DNA changes that randomly introduce new alleles in a population, changing the allele population
What is a mutation?
Ascended from the same organism, adapted to their environment differently
What is a homologous structure?
Any special signals or behaviours that are species specific prevent interbreeding with closely related species
What is behavioural isolating mechanisms?
The net movement of alleles from one population to another as a result of migration of individuals
What is gene flow?
Speciation in which populations within the same geographical areas diverge and become reproductive isolated
What is sympatric speciation?
The process where organisms better adapted to their environment have a better change of survival/reproduction
What is natural selection?
Reduces version of a structure that was functional in an organisms ancestors
What is a vestigial structure?
Two species may live in the same general region but in different habitats, so they may encounter each other rarely, if at all
What is habitat isolating mechanisms?
The number of copies of an allele compared to the total number of alleles in a population
What is allele frequency?
Occurs when 2 species share a common ancestor and evolve one or more characteristics that make them different to each other
What is divergent evolution?
The net movement of alleles from one population to another as a result of migration of individuals
What is gene flow?
Shows intermediary links between groups of organisms and shares characteristics common to now separate groups
What are traditional fossils?
Timing barriers
What is temporal isolating mechanisms?
Occurs when the frequency of an allele in a population changes
What is microevolution?
Occurs when organisms that aren't closely related evolve similar behaviours/features, often as solutions to the same problems
What is convergent evolution?
Change in frequencies of alleles due to change events in a breeding population
What is genetic drift?
The study of the formation and development of an embryo and fetus
What is embryology?
Closely related species that are anatomically incompatible
What is mechanical isolating mechanisms?
Gene pool change that results from a rapid decrease in population size
What is the bottleneck affect?
A form of allopatric speciation that is the diversification of a common ancestral species into a variety of differently adapted species
What is adaptive radiation?
Mating among individuals on the basis of mate selection for a particular phenotype or due to interbreeding
What is non random mating?
The study of the past and present geographical distribution of species populations
What is biogeography?
Where the egg and sperm from different species are prevented from meeting
What is gametic isolating mechanisms?
A change in a gene pool that occurs when a few individuals start a new isolated population
What is the founder affect?
States that evolution occurred rapidly and suddenly, followed by long periods of stability
What is punctuated equilibrium?