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Biology Ch 16
Evolution of Populations
Question | Answer |
---|---|
Proof of evolution | Fossils |
Random change in allele frequencies | Genetic Drift |
Formation of a new species | Speciation |
Genetic drift from population migration | Founder Effect |
Main source of variation | Mutations |
Sharp climatic shift | Episodic Speciation |
Ability to survive and reproduce | Fitness |
Potential lethal allele carrier | Heterozygote |
Species can no longer interbreed with original species | Reproductive Isolation |
Variation within a species, helps ensure species survival | Biodiversity |
Sharp and sudden decrease in specie numbers | Mass Extinction |
Happens during meiosis, alleles trade locations | Gene Shuffling |
Physical separation such as rivers or mountains | Geographic Isolation |
Change that increases survival chances | Adaptation |
Individuals in the middle or norm are most fit | Stabilizing Selection |
Bell curve shifts to the left OR right | Directional Selection |
Bell curve shifts to the left AND right simultaneously | Disruptive Selection |