Causes of Microevolution
The evolutionary change within a species or small group of organisms, especially over a short time period
What is microevolution?
The genes responsible for a particular trait (ex. Bb, bb)
What is genotype?
The basic requirement of natural selection
What is genetic variation?
Term describing when a species no longer exists on Earth
What is extinction?
Genetic exchange due to migration of individuals between populations.
What is gene flow?
What is phenotype?
Organisms select mates based on a variety of different factors
What is non-random mating?
A random change in allele frequencies within a population
What is genetic drift?
The number of times an allele occurs in a gene pool, compared to the total number of alleles in that pool for the same gene
What is allele frequency?
A random change in genetic code
What is a mutation?
The advantage of sexual selection, even though it is less efficient than asexual reproduction.
What is variation in a population?
The fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group
What is a transitional form?
process by which a single species or small group of species evolve into several different forms that live in different ways
What is adaptive radiation?
Bell curve where one of the extremes is favored over the mean or the other extreme
What is directional selection?
A diagram that shows the evolutionary relationships among organisms
What is a phylogenetic tree?