Evolution of Populations Practice Test Flashcards
Form of natural selection in which a single curve splits into two: occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle.
Disruptive selection
Combine genetic information of all the members of a particular population.
Gene pool
Random changes in allele frequencies that occurs in small population.
Genetic drift
Form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding.
Behavioral isolation
Change an allele frequencies as a result of the migration of a small sub group of a population.
Founder effect
Number of times, an allele occurs in a gene pool compared with the number of times other alles occur.
Relative frequency
Separation of species are populations so that they cannot interbreed and produce fertile offspring.
Reproductive isolation
Directional selection: form of natural selection which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the end of the curve.
True
Geographic isolation: form of reproductive, isolation, in which two populations reproduce at different times.
False
Genetic equilibrium: principle that allele frequencies in a population will remain constant unless one or more factors cause the frequencies to change.
True
Speciation: formation of new species
True
Temporal isolation: form of reproductive isolation in which two populations reproduce at different times
True
Stabilizing selection: form of natural selection in which a single curve splits into two: occurs when individuals at the upper and lower end of a distribution curve have higher fitness than individuals near the middle.
False
When individuals with an average form of a trait, have the highest fitness, the result is
Stabilizing selection
