| A | B |
|---|
| Balanced Polymorphism | The presence of two or more phenotypically distinct forms of a trait in a single population |
| Hardy-Weinberg Equilibrium | Describes a stable, nonevolving population |
| Genetic Drift | A change in the gene pool due to chance. |
| Gene Flow | The movement of alleles into or out of a population |
| Nonrandom Mating | Individuals choose mates that are best adapted |
| Bottleneck Effect | A form of genetic drift where natural disasters reduce the size of the population and cause the loss of genetic variation. |
| Founder Effect | A form of genetic drift when a small population breaks away from a larger one to colonize a new area |
| Mutation | Any change in genetic material |
| Diploidy | The normal condition of sexually reproducing organisms |
| Heterozygote Advantage | The hybrid state is selected for because it has a greater survival rate and reproductive success. |
| Sexual Dimorphism | Differences in appearance between the males and females of one species; ex. male birds are often have brighter plumage compared to their female counterparts. |
| Artificial Selection | Humans breed organisms by seekng individuals with desired traits for breeding stock |
| Sexual Selection | A type of natural select where the fittest male gets the mate |
| Stabilizing Selection | A type of natural selection where the extreme phenotypes are favored against in a population. |
| Diversifing Selection | A type of natural selection where the extreme phenotypes in a population are favored at the expense of intermediate forms. |
| Directional Selection | A type of natural selection where changing environmental conditions cause one population to replace another or shift toward one of the extreme phenotypes. |
