Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Gene pool |
Consists of all genes present in a population including all alleles from each gene |
|
|
Allele frequency |
The number of times in allele occurs in a gene pool, as a percentage of the total occurrence of all alleles for that gene |
|
|
Single gene trait |
Trait controlled by one gene that has two alleles |
|
|
Polygenic trait |
Trait controlled by two or more genes |
|
|
Directional selection |
When individuals at one end of distribution curve have the highest fitness; skewed distribution curve |
|
|
Stabilizing selection |
Where individuals near the center of the distribution curve have higher fitness than individuals at either end of the curve |
|
|
Reproductive isolation |
Separation of species or population so they no longer inbreed and evolve into separate species |
|
|
Behavioral isolation |
When two populations develop difference in courtship or other behaviors that prevent breeding |
|
|
Geographical isolation |
When two populations are separated by geographic barriers leading to the formation of two separate sub species |
|
|
Temporal isolation |
When two or more species reproduce at different times |
|
|
Disruptive selection |
When individuals at both ends have higher fitness than the middle |
|
|
Genetic drift |
Sum total of all different forms genetic information carried by a particular species or by all organisms on earth |
|
|
Bottleneck effect |
Change in allele frequency following a dramatic reduction in the size of the population |
|
|
Founder effect |
Change in allele frequency‘s as a result of the migration of a smaller subspecies of a population |
|
|
Genetic equilibrium |
Allele frequencies in a population remain the same |
|
|
Hardy-Weinberg principle |
States that allele frequencies remain constant until one or more factors cause the frequency to change |
|
|
Sexual selection |
Selection of mates based on heritable traits |
|
|
Gene flow |
Movement of genes in or out of a population |
|
|
Speciation |
Formation of a new species |
