Evolution Flashcards
Evolution
A change over time
Adaption
Heritable trait that helps organisms survive/ reproduce
Fitness
How well an organism can survive/ reproduce in its environment
Fossil
remains and traces of ancient organisms
Bio-geography
Study of where organisms live now and where their ancestors lived
Gene Pool
All genes present in a population
Genetic Variation
Genetic differences in a population
Allele Frequency
Number of times an allele shows up in a gene pool
Genetic Equilibrium
When a population doesn’t evolve
Artificial Selection
Humans breeding animals for desired traits
Natural Selection
Organisms in nature that have suitable traits for their environment that they develop
Sexual Selection
females of a species picking a mate based on size, strengths, or color (non-random mating)
Genetic Drift
random change in allele frequency
Bottleneck Effect
a change in allele frequency with a big reduction of a population
Founder Effect
Allele frequency changes because of migration
Reproductive Isolation
Species don’t inbreed and evolve into a new species
Homologous Structure
Similar structures shared with related species inherited from ancestors
Analogous Structure
Similar Structure with different species who don’t share a common ancestor
What does the thumb represent?
Natural Selection
What does the index finger represent?
Gene Flow
The Middle finger is for mutation
true
The ring fingerr is for genetic Drift
False
The ring finger is for non-random mating
What does the pinky represent?
Genetic Drift
