Basics of Evolution
The change of a species over a long period of time.
Evolution
The passing down of traits.
Heredity
Differences between organisms
Variation
What is a change or mistake in genetic code
Mutation
A group of organisms that can breed with each other and have kids
Species
Who thought of natural selection?
Charles Darwin
Many organisms need the same resources but they can’t all have it.
Competition
Study of embryos
Embryology
All the genes that could occur in a population
Gene pool
Forced natural selection by humans
Artificial selection
How some organisms survive better than others.
Natural selection
How organisms survive better than others (their level of success).
Fitness
Similar structure in different species (sharing a common ancestor)
Homologous structure
Change in allele frequency (by random chance)
Genetic drift
Separation of a species by a physical land block
Geographic isolation
What is it called when all species have the same ancestors.
Common descent
A trait an organism learns or acquires in its life.
Acquired trait
Structures that no longer have a use and come from a common ancestor
Vestigial structure
Change of gene frequency (movement of genes in/out of a population)
Gene flow
Not able to breed because of behavior
Behavioral isolation
The need to change with the environment to survive.
Adaptation
Homozygous
2 chromosomes (having identical alleles on both chromosomes)
Structure in different species that look similar but don’t have a common ancestor
Analogous structure
Selection that favors one trait extremely
Directional selection
When two populations evolve differently
Divergent evolution