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Created by Educational Technology Network

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

3. Question
_________ ___________ is the measure of how common a certain allele is in the population.

4. Answer 1 – 10
Allele Frequency

5. Question
_______ ________ is the combined alleles of all the individuals in a population.

6. Answer 1 – 20
Gene Pool

7. Question
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.

8. Answer 1 – 30
Variation

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

10. Answer 1 – 40
Recombination

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

12. Answer 1 – 50
Mutation

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

14. Answer 2 – 10
Microevolution

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

16. Answer 2 – 20
Normal Distribution

17. Question
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.

18. Answer 2 – 30
Directional Selection

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

20. Answer 2 – 40
Disruptive Selection

21. Question
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.

22. Answer 2 – 50
Stabilizing Selection

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

24. Answer 3 – 10
Sexual Selection

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

26. Answer 3 – 20
Bottleneck Effect

27. Question
Genetic drift that occurs after a small number of individuals colonize a new area.

28. Answer 3 – 30
Founder Effect

29. Question
The physical movement of alleles from one population to another.

30. Answer 3 – 40
Gene Flow

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

32. Answer 3 – 50
Genetic Drift

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

34. Answer 4 – 10
Hardy-Weinberg equilibrium

35. Question
The evolution of two or more species from one ancestral species.

36. Answer 4 – 20
Speciation

37. Question
Isolation between populations due to differences in courtship or mating behavior.

38. Answer 4 – 30
Behavioral Isolation

39. Question
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.

40. Answer 4 – 40
Temporal Isolation

41. Question
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.

42. Answer 4 – 50
Reproductive Isolation

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

44. Answer 5 – 10
Punctuated Equilibrium

45. Question
The elimination of a species from Earth.

46. Answer 5 – 20
Extinction

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

48. Answer 5 – 30
Divergent Evolution

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

50. Answer 5 – 40
Coevolution

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

52. Answer 5 – 50
Convergent Evolution