combined genetic information of all the members of a particular population
number of times an allele occurs in a gene pool compared with the number of times other alleles occur
change in a DNA sequence that affects genetic information
Gene shuffling is when the natural trait of a single phenotype favours over the extreme traits over the intermediate.
Single Gene Trait
trait controlled by a single gene
trait controlled by two or more genes
form of natural selection in 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 other end of the curve.
form of natural selection by which the center of the curve remains in its current position; occurs when individuals near the center of a distribution curve have higher fitness than individuals at either end.
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.
random change in allele frequencies that occurs in small populations.
change in allele frequencies as a result of the migration of a small subgroup of a population.
principle that allele frequencies in a population will remain constant unless one or more factors cause the frequencies to change.
situation in which allele frequencies remain constant
formation of new species.
separation of species or populations so they cannot interbreed and produce fertile offspring.
form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding.
form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water.
form of reproductive isolation in which two populations reproduce at different times.
differences in a community
large-scale evolutionary changes that take place over long periods of time.
event in which many types of living thins become extinct at the same time.
process by which a single species or small group of species evolves into several different forms that live in different ways; rapid growth in the diversity of a group of organisms.
process by which unrelated organisms independently evolve similarities when adapting to similar environments.
process by which two species evolve in response to changes in each other.
pattern of evolution in which long stable periods are interrupted by brief period of more rapid change.
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