| A | B |
|---|
| population | # of individuals of the same species in a given area |
| gene pool | total aggragate of all genes at a given time |
| Hardy-Weinberg theorem | frequencies of alleles and genotypes remain constant |
| microevolution | a change in a populations genetic structure |
| genetic drift | changes in a gene pool of small population due to chance |
| bottleneck effect | the makeup of a small surviving population is not representive of the orginal population |
| founder effect | genetic drift in a newly formed colony by a small number of individuals |
| assortive mating | individuals select mates like themselves in some phenotypic way |
| cline | a graded change of a trait along a geographic line |
| stabilizing selection | acts against extreem phenotypes and favors common variations |
| directional selection | shift to both extremes ex. large bills and short bills |
| sexual dimorphism | distinct sex chacteristics in males and females |
