Elements of Evolution
All species have descended from a common ancestor
What is common descent?
What is phenotype not genotype?
Competition for resources (food, water, mates, territory)
Small and large ants don't survive; medium ants do
What is stabilizing selection?
What is descent with modification?
All of the alleles present in a population
What is a gene pool?
More offspring are produced than can survive
What is overproduction of offspring?
What is directional selection?
Evolution of traits to be better suited to the environment
What is adaptation?
The number of times an allele occurs in a gene pool
Those with the most advantageous traits survive and reproduce?
What is differential survival and reproduction? (or what is natural selection?)
What is disruptive selection?
An organism's ability to pass its genes to its offspring
What is fitness?
Source of new genetic variation on which natural selection can act
What are mutations
This famous organism quickly changed from mostly white to mostly black during the Industrial Revolution
What are peppered moths?
Birds with small, medium, and large beaks go through stabilizing selection. These birds survive.
What are medium birds?
What is variation?
Can be beneficial, neutral, or harmful
What are mutations?
A form of a gene that kills the organism that inherits it
What is a lethal allele?
Due to humans impacting their environment, coyotes that are small can slip through fences and roam larger territories, giving them access to more prey and mates.
What is directional selection?