Type Topic in here! Created by Educational Technology Network. www.edtechnetwork.com 2009

Genetic Variation Within Populations Natural Selection in Populations Other Mechanisms of Evolution Hardy-Weinberg and Speciation Patterns in Evolution 10 20 30 40 50

Question 1 - 10 _________ ___________ is the measure of how common a certain allele is in the population.

Answer 1 – 10 Allele Frequency

Question 1 - 20 _______ ________ is the combined alleles of all the individuals in a population.

Answer 1 – 20 Gene Pool

Question 1 - 30 Genetic __________ refers to differences in physical traits of an individual from the group to which it belongs and helps to improve the fitness of a species.

Answer 1 – 30 Variation

Question 1 - 40 ___________ refers to the new allele combinations formed in offspring, most of which occurs during meiosis.

Answer 1 – 40 Recombination

Question 1 - 50 A(n) ________________ is a random change in the DNA of a gene and increases genetic variation.

Answer 1 – 50 Mutation

Question 2 - 10 ___________ is the observable change in the allele frequencies of a single population over time.

Answer 2 – 10 Microevolution

Question 2 - 20 _____________ is the distribution in a population in which allele frequency is highest near the mean range value and decreases progressively toward each extreme end.

Answer 2 – 20 Normal Distribution

Question 2 - 30 The pathway of natural selection in which one uncommon phenotype is selected over a more common phenotype shifting the bell curve either left or right.

Answer 2 – 30 Directional Selection

Question 2 - 40 The pathway of natural selection in which two opposite, but equally uncommon, phenotypes are selected over the most common phenotype.

Answer 2 – 40 Disruptive Selection

Question 2 - 50 The pathway of natural selection in which intermediate phenotypes are selected over phenotypes at both extremes causing the middle of the bell curve to get taller.

Answer 2 – 50 Stabilizing Selection

Question 3 - 10 The type of selection in which certain traits enhance mating success; traits are, therefore, passed on to offspring.

Answer 3 – 10 Sexual Selection

Question 3 - 20 Genetic drift that results from an event that drastically reduces the size of a population.

Answer 3 – 20 Bottleneck Effect

Question 3 - 30 Genetic drift that occurs after a small number of individuals colonize a new area.

Answer 3 – 30 Founder Effect

Question 3 - 40 The physical movement of alleles from one population to another.

Answer 3 – 40 Gene Flow

Question 3 - 50 The change in allele frequencies due to chance alone, occurring most commonly in small populations.

Answer 3 – 50 Genetic Drift

Question 4 - 10 A condition in which a population’s allele frequencies for a given trait do not change from generation to generation.

Answer 4 – 10 Hardy-Weinberg equilibrium

Question 4 - 20 The evolution of two or more species from one ancestral species.

Answer 4 – 20 Speciation

Question 4 - 30 Isolation between populations due to differences in courtship or mating behavior.

Answer 4 – 30 Behavioral Isolation

Question 4 - 40 Isolation between populations due to barriers related to time, such as differences in mating periods or differences in the time of day that individuals are most active.

Answer 4 – 40 Temporal Isolation

Question 4 - 50 The final stage of speciation, in which members of isolated populations are either no longer able to mate or no longer able to produce viable offspring.

Answer 4 – 50 Reproductive Isolation

Question 5 - 10 The theory that states that speciation occurs suddenly and rapidly followed by long periods of little evolutionary change.

Answer 5 – 10 Punctuated Equilibrium

Question 5 - 20 The elimination of a species from Earth.

Answer 5 – 20 Extinction

Question 5 - 30 The evolution of one or more closely related species into different species; resulting from adaptations to different environmental conditions.

Answer 5 – 30 Divergent Evolution

Question 5 - 40 The process in which two or more species evolve in response to changes in each other.

Answer 5 – 40 Coevolution

Question 5 - 50 The evolution toward similar characteristics in unrelated species, resulting from adaptations to similar environmental conditions.

Answer 5 – 50 Convergent Evolution