Term
|
Definition
| Genetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population. |
|
|
Term
|
Definition
| A cause of genetic drift attributable to colonization by a limited number of individuals from a parent popultaion |
|
|
Term
|
Definition
| Coexistence of two or more distinct forms of individuals in the same population |
|
|
Term
|
Definition
| Differences in genetic structure between populations |
|
|
Term
|
Definition
| Graded change in same trait along a geographic axis |
|
|
Term
|
Definition
| A mechanism that preserves variation in eukaryote gene pools by conferring greater reproductive success on heterozygotes over individuals homozygous for any on associated allele |
|
|
Term
| Frequency Dependent Selection |
|
Definition
| Decline in the reproductive success of a morph resulting from the morph's phenotype becoming too common |
|
|
Term
|
Definition
| Genetic diversity that confers no apparent selective advantage |
|
|
Term
|
Definition
| Special signals that attract mates are reproductive barriers to closely realted species |
|
|
Term
|
Definition
| Population or group of populations whose members can interbreed |
|
|
Term
|
Definition
| Niches define the species |
|
|
Term
|
Definition
| Natural barriers isolate populations creating different species |
|
|
Term
|
Definition
| Ancestral population becomes segregated by a geographical barrier |
|
|
Term
|
Definition
| Radical change in genome that produces reproductivley isolated subpopulation in midst of parent population |
|
|
Term
|
Definition
| spurts of relatively rapid change followed by long periods of stasis |
|
|
Term
|
Definition
| profound change is a cumulative product of a slow but continuous process |
|
|
Term
|
Definition
Major changes in a population overtime
ex. new species |
|
|
Term
|
Definition
small changes in a population over time
ex. color variation |
|
|
Term
|
Definition
| Acts against extreme phenotypes and favors the norm |
|
|
Term
|
Definition
| A shift in phenotype frequency in one direction |
|
|
Term
|
Definition
| Individuals on both extremes are favored |
|
|
Term
|
Definition
| Females depend on quality; males on quantity |
|
|
